CVE-2021-25978

Apostrophe - XSS

View on CVE.org

Published Nov 7, 2021 CVSS 3.1 · 5.4 Medium EPSS < 1% KEV · Not listed

Description

Apostrophe CMS versions between 2.63.0 to 3.3.1 are vulnerable to Stored XSS where an editor uploads an SVG file that contains malicious JavaScript onto the Images module, which triggers XSS once viewed.

Affected Products

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

Apostrophe

Apostrophe

affected

Version	Status	Constraints
`unspecified`	affected	≤ 3.3.1
`2.63.0`	affected	< unspecified

Configuration 1 [-]

cpe:2.3:a:apostrophecms:apostrophecms:*:*:*:*:*:*:*:*

No data.

No data available yet.

Remediation

Vendor Solution

Upgrade to version 3.4.0

Tracking

Sign in to view the affected projects.

Advisories

Source	ID	Title
EUVD	EUVD-2021-2296	Apostrophe CMS versions between 2.63.0 to 3.3.1 are vulnerable to Stored XSS where an editor uploads an SVG file that contains malicious JavaScript onto the Images module, which triggers XSS once viewed.
Github GHSA	GHSA-4r9c-jghc-cx5m	Cross-site Scripting in apostrophe

Metrics

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Scope Changed

Confidentiality Impact Low

Integrity Impact Low

Availability Impact None

User Interaction Required

No CVSS v3.0

Access Vector Network

Access Complexity Medium

Authentication Single

Confidentiality Impact None

Integrity Impact Partial

Availability Impact None

This CVE is not in the KEV list.

Exploit prediction score: < 1% (0.499% probability within 30 days)

Exploitation none

Automatable no

Technical Impact partial

References

Link	Providers
https://github.com/apostrophecms/apostrophe/commit/c8b94ee9c79468f1ce28e31966cb0e0839165e59

History

Apr 30, 2025 4:15 PM Scoring metrics updated View changes

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Subscriptions

Apostrophecms Apostrophecms

Weaknesses

CWE-79

Sources

CVE record Updated: Apr 30, 2025, 3:52 PM

Status: PUBLISHED
Assigner: Mend
Published: Nov 7, 2021, 5:15 PM
Updated: Apr 30, 2025, 3:52 PM
Reserved: Jan 22, 2021, 12:00 AM

View source JSON

Vulnrichment Updated: Aug 3, 2024, 8:19 PM

Updated: Aug 3, 2024, 8:19 PM

NVD Updated: Jun 17, 2026, 3:42 AM

Status: Modified
Published: Nov 7, 2021, 6:15 PM
Modified: Jun 17, 2026, 3:42 AM

View source JSON

Red Hat No data

No data.

OpenCVE enrichment No data

No data.

{"containers": {"cna": {"affected": [{"product": "Apostrophe ", "vendor": "Apostrophe ", "versions": [{"lessThanOrEqual": "3.3.1", "status": "affected", "version": "unspecified", "versionType": "custom"}, {"lessThan": "unspecified", "status": "affected", "version": "2.63.0", "versionType": "custom"}]}], "credits": [{"lang": "en", "value": "Daniel Elkabes"}], "descriptions": [{"lang": "en", "value": "Apostrophe CMS versions between 2.63.0 to 3.3.1 are vulnerable to Stored XSS where an editor uploads an SVG file that contains malicious JavaScript onto the Images module, which triggers XSS once viewed."}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 5.4, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "LOW", "scope": "CHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N", "version": "3.1"}}], "problemTypes": [{"descriptions": [{"cweId": "CWE-79", "description": "CWE-79 Cross-site Scripting (XSS)", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"dateUpdated": "2021-11-07T17:15:10.000Z", "orgId": "478c68dd-22c1-4a41-97cd-654224dfacff", "shortName": "Mend"}, "references": [{"tags": ["x_refsource_MISC"], "url": "https://github.com/apostrophecms/apostrophe/commit/c8b94ee9c79468f1ce28e31966cb0e0839165e59"}], "solutions": [{"lang": "en", "value": "Upgrade to version 3.4.0"}], "source": {"advisory": "https://www.whitesourcesoftware.com/vulnerability-database/CVE-2021-25978", "discovery": "EXTERNAL"}, "title": "Apostrophe - XSS", "x_generator": {"engine": "Vulnogram 0.0.9"}, "x_legacyV4Record": {"CVE_data_meta": {"ASSIGNER": "vulnerabilitylab@whitesourcesoftware.com", "ID": "CVE-2021-25978", "STATE": "PUBLIC", "TITLE": "Apostrophe - XSS"}, "affects": {"vendor": {"vendor_data": [{"product": {"product_data": [{"product_name": "Apostrophe ", "version": {"version_data": [{"version_affected": "<=", "version_value": "3.3.1"}, {"version_affected": ">=", "version_value": "2.63.0"}]}}]}, "vendor_name": "Apostrophe "}]}}, "credit": [{"lang": "eng", "value": "Daniel Elkabes"}], "data_format": "MITRE", "data_type": "CVE", "data_version": "4.0", "description": {"description_data": [{"lang": "eng", "value": "Apostrophe CMS versions between 2.63.0 to 3.3.1 are vulnerable to Stored XSS where an editor uploads an SVG file that contains malicious JavaScript onto the Images module, which triggers XSS once viewed."}]}, "generator": {"engine": "Vulnogram 0.0.9"}, "impact": {"cvss": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 5.4, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "LOW", "scope": "CHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N", "version": "3.1"}}, "problemtype": {"problemtype_data": [{"description": [{"lang": "eng", "value": "CWE-79 Cross-site Scripting (XSS)"}]}]}, "references": {"reference_data": [{"name": "https://github.com/apostrophecms/apostrophe/commit/c8b94ee9c79468f1ce28e31966cb0e0839165e59", "refsource": "MISC", "url": "https://github.com/apostrophecms/apostrophe/commit/c8b94ee9c79468f1ce28e31966cb0e0839165e59"}]}, "solution": [{"lang": "en", "value": "Upgrade to version 3.4.0"}], "source": {"advisory": "https://www.whitesourcesoftware.com/vulnerability-database/CVE-2021-25978", "discovery": "EXTERNAL"}}}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-03T20:19:19.357Z"}, "title": "CVE Program Container", "references": [{"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://github.com/apostrophecms/apostrophe/commit/c8b94ee9c79468f1ce28e31966cb0e0839165e59"}]}, {"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2025-04-30T15:48:54.843310Z", "id": "CVE-2021-25978", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2025-04-30T15:52:43.284Z"}}]}, "cveMetadata": {"assignerOrgId": "478c68dd-22c1-4a41-97cd-654224dfacff", "assignerShortName": "Mend", "cveId": "CVE-2021-25978", "datePublished": "2021-11-07T17:15:10.000Z", "dateReserved": "2021-01-22T00:00:00.000Z", "dateUpdated": "2025-04-30T15:52:43.284Z", "state": "PUBLISHED"}, "dataType": "CVE_RECORD", "dataVersion": "5.1"}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CVE Program Container", "references": [{"url": "https://github.com/apostrophecms/apostrophe/commit/c8b94ee9c79468f1ce28e31966cb0e0839165e59", "tags": ["x_refsource_MISC", "x_transferred"]}], "providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-03T20:19:19.357Z"}}, {"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2021-25978", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2025-04-30T15:48:54.843310Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2025-04-30T15:51:28.736Z"}}], "cna": {"title": "Apostrophe - XSS", "source": {"advisory": "https://www.whitesourcesoftware.com/vulnerability-database/CVE-2021-25978", "discovery": "EXTERNAL"}, "credits": [{"lang": "en", "value": "Daniel Elkabes"}], "metrics": [{"cvssV3_1": {"scope": "CHANGED", "version": "3.1", "baseScore": 5.4, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N", "integrityImpact": "LOW", "userInteraction": "REQUIRED", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "LOW", "confidentialityImpact": "LOW"}}], "affected": [{"vendor": "Apostrophe ", "product": "Apostrophe ", "versions": [{"status": "affected", "version": "unspecified", "versionType": "custom", "lessThanOrEqual": "3.3.1"}, {"status": "affected", "version": "2.63.0", "lessThan": "unspecified", "versionType": "custom"}]}], "solutions": [{"lang": "en", "value": "Upgrade to version 3.4.0"}], "references": [{"url": "https://github.com/apostrophecms/apostrophe/commit/c8b94ee9c79468f1ce28e31966cb0e0839165e59", "tags": ["x_refsource_MISC"]}], "x_generator": {"engine": "Vulnogram 0.0.9"}, "descriptions": [{"lang": "en", "value": "Apostrophe CMS versions between 2.63.0 to 3.3.1 are vulnerable to Stored XSS where an editor uploads an SVG file that contains malicious JavaScript onto the Images module, which triggers XSS once viewed."}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-79", "description": "CWE-79 Cross-site Scripting (XSS)"}]}], "providerMetadata": {"orgId": "478c68dd-22c1-4a41-97cd-654224dfacff", "shortName": "Mend", "dateUpdated": "2021-11-07T17:15:10.000Z"}, "x_legacyV4Record": {"credit": [{"lang": "eng", "value": "Daniel Elkabes"}], "impact": {"cvss": {"scope": "CHANGED", "version": "3.1", "baseScore": 5.4, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N", "integrityImpact": "LOW", "userInteraction": "REQUIRED", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "LOW", "confidentialityImpact": "LOW"}}, "source": {"advisory": "https://www.whitesourcesoftware.com/vulnerability-database/CVE-2021-25978", "discovery": "EXTERNAL"}, "affects": {"vendor": {"vendor_data": [{"product": {"product_data": [{"version": {"version_data": [{"version_value": "3.3.1", "version_affected": "<="}, {"version_value": "2.63.0", "version_affected": ">="}]}, "product_name": "Apostrophe "}]}, "vendor_name": "Apostrophe "}]}}, "solution": [{"lang": "en", "value": "Upgrade to version 3.4.0"}], "data_type": "CVE", "generator": {"engine": "Vulnogram 0.0.9"}, "references": {"reference_data": [{"url": "https://github.com/apostrophecms/apostrophe/commit/c8b94ee9c79468f1ce28e31966cb0e0839165e59", "name": "https://github.com/apostrophecms/apostrophe/commit/c8b94ee9c79468f1ce28e31966cb0e0839165e59", "refsource": "MISC"}]}, "data_format": "MITRE", "description": {"description_data": [{"lang": "eng", "value": "Apostrophe CMS versions between 2.63.0 to 3.3.1 are vulnerable to Stored XSS where an editor uploads an SVG file that contains malicious JavaScript onto the Images module, which triggers XSS once viewed."}]}, "problemtype": {"problemtype_data": [{"description": [{"lang": "eng", "value": "CWE-79 Cross-site Scripting (XSS)"}]}]}, "data_version": "4.0", "CVE_data_meta": {"ID": "CVE-2021-25978", "STATE": "PUBLIC", "TITLE": "Apostrophe - XSS", "ASSIGNER": "vulnerabilitylab@whitesourcesoftware.com"}}}}, "cveMetadata": {"cveId": "CVE-2021-25978", "state": "PUBLISHED", "dateUpdated": "2025-04-30T15:52:43.284Z", "dateReserved": "2021-01-22T00:00:00.000Z", "assignerOrgId": "478c68dd-22c1-4a41-97cd-654224dfacff", "datePublished": "2021-11-07T17:15:10.000Z", "assignerShortName": "Mend"}, "dataVersion": "5.1"}

{"affected": [{"affectedData": [{"product": "Apostrophe ", "vendor": "Apostrophe ", "versions": [{"lessThanOrEqual": "3.3.1", "status": "affected", "version": "unspecified", "versionType": "custom"}, {"lessThan": "unspecified", "status": "affected", "version": "2.63.0", "versionType": "custom"}]}], "source": "vulnerabilitylab@mend.io"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:apostrophecms:apostrophecms:*:*:*:*:*:*:*:*", "matchCriteriaId": "CCE7D4A0-5A5B-4617-BFEC-2BD0ACE0312D", "versionEndIncluding": "3.3.1", "versionStartIncluding": "2.63.0", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Apostrophe CMS versions between 2.63.0 to 3.3.1 are vulnerable to Stored XSS where an editor uploads an SVG file that contains malicious JavaScript onto the Images module, which triggers XSS once viewed."}, {"lang": "es", "value": "Apostrophe CMS versiones entre la 2.63.0 y la 3.3.1, son vulnerables a un ataque de tipo XSS almacenado, en el que un editor carga un archivo SVG que contiene JavaScript malicioso en el m\u00f3dulo de im\u00e1genes, lo que desencadena un ataque de tipo XSS una vez visualizado"}], "id": "CVE-2021-25978", "lastModified": "2026-06-17T03:42:43.100", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "LOW", "cvssData": {"accessComplexity": "MEDIUM", "accessVector": "NETWORK", "authentication": "SINGLE", "availabilityImpact": "NONE", "baseScore": 3.5, "confidentialityImpact": "NONE", "integrityImpact": "PARTIAL", "vectorString": "AV:N/AC:M/Au:S/C:N/I:P/A:N", "version": "2.0"}, "exploitabilityScore": 6.8, "impactScore": 2.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": true}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 5.4, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "LOW", "scope": "CHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 2.3, "impactScore": 2.7, "source": "vulnerabilitylab@mend.io", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 5.4, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "LOW", "scope": "CHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 2.3, "impactScore": 2.7, "source": "nvd@nist.gov", "type": "Primary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2021-25978", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2025-04-30T15:48:54.843310Z", "version": "2.0.3"}}]}, "published": "2021-11-07T18:15:07.620", "references": [{"source": "vulnerabilitylab@mend.io", "tags": ["Patch", "Third Party Advisory"], "url": "https://github.com/apostrophecms/apostrophe/commit/c8b94ee9c79468f1ce28e31966cb0e0839165e59"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch", "Third Party Advisory"], "url": "https://github.com/apostrophecms/apostrophe/commit/c8b94ee9c79468f1ce28e31966cb0e0839165e59"}], "sourceIdentifier": "vulnerabilitylab@mend.io", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-79"}], "source": "vulnerabilitylab@mend.io", "type": "Secondary"}, {"description": [{"lang": "en", "value": "CWE-79"}], "source": "nvd@nist.gov", "type": "Primary"}]}