CVE-2021-34817

View on CVE.org

Published Jul 19, 2021 CVSS 3.1 · 6.1 Medium EPSS 1.3% KEV · Not listed

Description

A Cross-Site Scripting (XSS) issue in the chat component of Etherpad 1.8.13 allows remote attackers to inject arbitrary JavaScript or HTML by importing a crafted pad.

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

n/a

n/a

affected

Version	Status	Constraints
`n/a`	affected	—

Configuration 1 [-]

cpe:2.3:a:etherpad:etherpad:1.8.13:*:*:*:*:*:*:*

No data.

No data available yet.

Remediation

No solution or workaround provided in the CVE record

Tracking

Sign in to view the affected projects.

Advisories

Source	ID	Title
EUVD	EUVD-2021-21464	A Cross-Site Scripting (XSS) issue in the chat component of Etherpad 1.8.13 allows remote attackers to inject arbitrary JavaScript or HTML by importing a crafted pad.

Metrics

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

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 None

Confidentiality Impact None

Integrity Impact Partial

Availability Impact None

This CVE is not in the KEV list.

Exploit prediction score: 1.3% (1.343% probability within 30 days)

Key SSVC decision points have not yet been added.

References

Link	Providers
https://blog.sonarsource.com/etherpad-code-execution-vulnerabilities
https://etherpad.org/#download
https://github.com/ether/etherpad-lite/commit/a7968115581e20ef47a533e030f59f830486bdfa
https://github.com/ether/etherpad-lite/releases/tag/1.8.14

History

No history.

Subscriptions

Etherpad Etherpad

Weaknesses

CWE-79

Sources

CVE record Updated: Aug 4, 2024, 12:26 AM

Status: PUBLISHED
Assigner: mitre
Published: Jul 19, 2021, 1:38 PM
Updated: Aug 4, 2024, 12:26 AM
Reserved: Jun 17, 2021, 12:00 AM

View source JSON

Vulnrichment No data

No data.

NVD Updated: Jun 17, 2026, 3:56 AM

Status: Modified
Published: Jul 19, 2021, 2:15 PM
Modified: Jun 17, 2026, 3:56 AM

View source JSON

Red Hat No data

No data.

OpenCVE enrichment No data

No data.

{"containers": {"cna": {"affected": [{"product": "n/a", "vendor": "n/a", "versions": [{"status": "affected", "version": "n/a"}]}], "descriptions": [{"lang": "en", "value": "A Cross-Site Scripting (XSS) issue in the chat component of Etherpad 1.8.13 allows remote attackers to inject arbitrary JavaScript or HTML by importing a crafted pad."}], "problemTypes": [{"descriptions": [{"description": "n/a", "lang": "en", "type": "text"}]}], "providerMetadata": {"dateUpdated": "2021-07-19T13:38:11.000Z", "orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "shortName": "mitre"}, "references": [{"tags": ["x_refsource_MISC"], "url": "https://etherpad.org/#download"}, {"tags": ["x_refsource_MISC"], "url": "https://github.com/ether/etherpad-lite/releases/tag/1.8.14"}, {"tags": ["x_refsource_MISC"], "url": "https://blog.sonarsource.com/etherpad-code-execution-vulnerabilities"}, {"tags": ["x_refsource_MISC"], "url": "https://github.com/ether/etherpad-lite/commit/a7968115581e20ef47a533e030f59f830486bdfa"}], "x_legacyV4Record": {"CVE_data_meta": {"ASSIGNER": "cve@mitre.org", "ID": "CVE-2021-34817", "STATE": "PUBLIC"}, "affects": {"vendor": {"vendor_data": [{"product": {"product_data": [{"product_name": "n/a", "version": {"version_data": [{"version_value": "n/a"}]}}]}, "vendor_name": "n/a"}]}}, "data_format": "MITRE", "data_type": "CVE", "data_version": "4.0", "description": {"description_data": [{"lang": "eng", "value": "A Cross-Site Scripting (XSS) issue in the chat component of Etherpad 1.8.13 allows remote attackers to inject arbitrary JavaScript or HTML by importing a crafted pad."}]}, "problemtype": {"problemtype_data": [{"description": [{"lang": "eng", "value": "n/a"}]}]}, "references": {"reference_data": [{"name": "https://etherpad.org/#download", "refsource": "MISC", "url": "https://etherpad.org/#download"}, {"name": "https://github.com/ether/etherpad-lite/releases/tag/1.8.14", "refsource": "MISC", "url": "https://github.com/ether/etherpad-lite/releases/tag/1.8.14"}, {"name": "https://blog.sonarsource.com/etherpad-code-execution-vulnerabilities", "refsource": "MISC", "url": "https://blog.sonarsource.com/etherpad-code-execution-vulnerabilities"}, {"name": "https://github.com/ether/etherpad-lite/commit/a7968115581e20ef47a533e030f59f830486bdfa", "refsource": "MISC", "url": "https://github.com/ether/etherpad-lite/commit/a7968115581e20ef47a533e030f59f830486bdfa"}]}}}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-04T00:26:53.996Z"}, "title": "CVE Program Container", "references": [{"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://etherpad.org/#download"}, {"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://github.com/ether/etherpad-lite/releases/tag/1.8.14"}, {"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://blog.sonarsource.com/etherpad-code-execution-vulnerabilities"}, {"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://github.com/ether/etherpad-lite/commit/a7968115581e20ef47a533e030f59f830486bdfa"}]}]}, "cveMetadata": {"assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "assignerShortName": "mitre", "cveId": "CVE-2021-34817", "datePublished": "2021-07-19T13:38:11.000Z", "dateReserved": "2021-06-17T00:00:00.000Z", "dateUpdated": "2024-08-04T00:26:53.996Z", "state": "PUBLISHED"}, "dataType": "CVE_RECORD", "dataVersion": "5.1"}

{"affected": [{"affectedData": [{"product": "n/a", "vendor": "n/a", "versions": [{"status": "affected", "version": "n/a"}]}], "source": "cve@mitre.org"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:etherpad:etherpad:1.8.13:*:*:*:*:*:*:*", "matchCriteriaId": "A5B28B8D-9C9D-41A7-834C-2DEBE3862A6D", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "A Cross-Site Scripting (XSS) issue in the chat component of Etherpad 1.8.13 allows remote attackers to inject arbitrary JavaScript or HTML by importing a crafted pad."}, {"lang": "es", "value": "Un problema de tipo Cross-Site Scripting (XSS) en el componente chat de Etherpad versi\u00f3n 1.8.13, permite a atacantes remotos inyectar JavaScript o HTML arbitrario al importar un pad dise\u00f1ado"}], "id": "CVE-2021-34817", "lastModified": "2026-06-17T03:56:37.430", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "MEDIUM", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "NONE", "baseScore": 4.3, "confidentialityImpact": "NONE", "integrityImpact": "PARTIAL", "vectorString": "AV:N/AC:M/Au:N/C:N/I:P/A:N", "version": "2.0"}, "exploitabilityScore": 8.6, "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": 6.1, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 2.7, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2021-07-19T14:15:08.150", "references": [{"source": "cve@mitre.org", "tags": ["Third Party Advisory"], "url": "https://blog.sonarsource.com/etherpad-code-execution-vulnerabilities"}, {"source": "cve@mitre.org", "tags": ["Patch", "Vendor Advisory"], "url": "https://etherpad.org/#download"}, {"source": "cve@mitre.org", "tags": ["Exploit", "Patch", "Third Party Advisory"], "url": "https://github.com/ether/etherpad-lite/commit/a7968115581e20ef47a533e030f59f830486bdfa"}, {"source": "cve@mitre.org", "tags": ["Patch", "Release Notes", "Third Party Advisory"], "url": "https://github.com/ether/etherpad-lite/releases/tag/1.8.14"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://blog.sonarsource.com/etherpad-code-execution-vulnerabilities"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch", "Vendor Advisory"], "url": "https://etherpad.org/#download"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Exploit", "Patch", "Third Party Advisory"], "url": "https://github.com/ether/etherpad-lite/commit/a7968115581e20ef47a533e030f59f830486bdfa"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch", "Release Notes", "Third Party Advisory"], "url": "https://github.com/ether/etherpad-lite/releases/tag/1.8.14"}], "sourceIdentifier": "cve@mitre.org", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-79"}], "source": "nvd@nist.gov", "type": "Primary"}]}