CVE-2021-3831

Cross-site Scripting (XSS) - Reflected in gnuboard/gnuboard5

View on CVE.org

Published Dec 14, 2021 CVSS 3.1 · 6.1 Medium EPSS 1.8% KEV · Not listed

Description

gnuboard5 is vulnerable to Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

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

gnuboard

gnuboard/gnuboard5

affected

Version	Status	Constraints
`unspecified`	affected	< 5.4.20

Configuration 1 [-]

cpe:2.3:a:gnuboard:gnuboard5:*:*:*:*:*:*:*:*

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-2021-27078	gnuboard5 is vulnerable to Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

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

Attack Vector Local

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact None

Integrity Impact High

Availability Impact High

User Interaction None

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: 1.8% (1.841% probability within 30 days)

Key SSVC decision points have not yet been added.

References

Link	Providers
https://github.com/gnuboard/gnuboard5/commit/2e81619ea87bc9c0b4a073d8df3c7693a6fdbf0d
https://huntr.dev/bounties/25775287-88cd-4f00-b978-692d627dff04

History

No history.

Subscriptions

Gnuboard Gnuboard5

Weaknesses

CWE-79

Sources

CVE record Updated: Aug 3, 2024, 5:09 PM

Status: PUBLISHED
Assigner: @huntrdev
Published: Dec 14, 2021, 10:50 AM
Updated: Aug 3, 2024, 5:09 PM
Reserved: Sep 27, 2021, 12:00 AM

View source JSON

Vulnrichment No data

No data.

NVD Updated: Jun 17, 2026, 4:05 AM

Status: Modified
Published: Dec 14, 2021, 11:15 AM
Modified: Jun 17, 2026, 4:05 AM

View source JSON

Red Hat No data

No data.

OpenCVE enrichment No data

No data.

{"containers": {"cna": {"affected": [{"product": "gnuboard/gnuboard5", "vendor": "gnuboard", "versions": [{"lessThan": "5.4.20", "status": "affected", "version": "unspecified", "versionType": "custom"}]}], "descriptions": [{"lang": "en", "value": "gnuboard5 is vulnerable to Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')"}], "metrics": [{"cvssV3_0": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.1, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H", "version": "3.0"}}], "problemTypes": [{"descriptions": [{"cweId": "CWE-79", "description": "CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"dateUpdated": "2021-12-14T10:50:10.000Z", "orgId": "c09c270a-b464-47c1-9133-acb35b22c19a", "shortName": "@huntrdev"}, "references": [{"tags": ["x_refsource_CONFIRM"], "url": "https://huntr.dev/bounties/25775287-88cd-4f00-b978-692d627dff04"}, {"tags": ["x_refsource_MISC"], "url": "https://github.com/gnuboard/gnuboard5/commit/2e81619ea87bc9c0b4a073d8df3c7693a6fdbf0d"}], "source": {"advisory": "25775287-88cd-4f00-b978-692d627dff04", "discovery": "EXTERNAL"}, "title": "Cross-site Scripting (XSS) - Reflected in gnuboard/gnuboard5", "x_legacyV4Record": {"CVE_data_meta": {"ASSIGNER": "security@huntr.dev", "ID": "CVE-2021-3831", "STATE": "PUBLIC", "TITLE": "Cross-site Scripting (XSS) - Reflected in gnuboard/gnuboard5"}, "affects": {"vendor": {"vendor_data": [{"product": {"product_data": [{"product_name": "gnuboard/gnuboard5", "version": {"version_data": [{"version_affected": "<", "version_value": "5.4.20"}]}}]}, "vendor_name": "gnuboard"}]}}, "data_format": "MITRE", "data_type": "CVE", "data_version": "4.0", "description": {"description_data": [{"lang": "eng", "value": "gnuboard5 is vulnerable to Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')"}]}, "impact": {"cvss": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.1, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H", "version": "3.0"}}, "problemtype": {"problemtype_data": [{"description": [{"lang": "eng", "value": "CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')"}]}]}, "references": {"reference_data": [{"name": "https://huntr.dev/bounties/25775287-88cd-4f00-b978-692d627dff04", "refsource": "CONFIRM", "url": "https://huntr.dev/bounties/25775287-88cd-4f00-b978-692d627dff04"}, {"name": "https://github.com/gnuboard/gnuboard5/commit/2e81619ea87bc9c0b4a073d8df3c7693a6fdbf0d", "refsource": "MISC", "url": "https://github.com/gnuboard/gnuboard5/commit/2e81619ea87bc9c0b4a073d8df3c7693a6fdbf0d"}]}, "source": {"advisory": "25775287-88cd-4f00-b978-692d627dff04", "discovery": "EXTERNAL"}}}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-03T17:09:09.511Z"}, "title": "CVE Program Container", "references": [{"tags": ["x_refsource_CONFIRM", "x_transferred"], "url": "https://huntr.dev/bounties/25775287-88cd-4f00-b978-692d627dff04"}, {"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://github.com/gnuboard/gnuboard5/commit/2e81619ea87bc9c0b4a073d8df3c7693a6fdbf0d"}]}]}, "cveMetadata": {"assignerOrgId": "c09c270a-b464-47c1-9133-acb35b22c19a", "assignerShortName": "@huntrdev", "cveId": "CVE-2021-3831", "datePublished": "2021-12-14T10:50:10.000Z", "dateReserved": "2021-09-27T00:00:00.000Z", "dateUpdated": "2024-08-03T17:09:09.511Z", "state": "PUBLISHED"}, "dataType": "CVE_RECORD", "dataVersion": "5.1"}

{"affected": [{"affectedData": [{"product": "gnuboard/gnuboard5", "vendor": "gnuboard", "versions": [{"lessThan": "5.4.20", "status": "affected", "version": "unspecified", "versionType": "custom"}]}], "source": "security@huntr.dev"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:gnuboard:gnuboard5:*:*:*:*:*:*:*:*", "matchCriteriaId": "959326D8-E70B-4C98-9495-58C2B5EF9585", "versionEndExcluding": "5.4.20", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "gnuboard5 is vulnerable to Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')"}, {"lang": "es", "value": "gnuboard5 es vulnerable a una Neutralizaci\u00f3n Inapropiada de la Entrada Durante la Generaci\u00f3n de P\u00e1ginas Web (\"Cross-site Scripting\")"}], "id": "CVE-2021-3831", "lastModified": "2026-06-17T04:05:51.353", "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}], "cvssMetricV30": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.1, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H", "version": "3.0"}, "exploitabilityScore": 1.8, "impactScore": 5.2, "source": "security@huntr.dev", "type": "Secondary"}], "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": "2021-12-14T11:15:07.417", "references": [{"source": "security@huntr.dev", "tags": ["Patch", "Third Party Advisory"], "url": "https://github.com/gnuboard/gnuboard5/commit/2e81619ea87bc9c0b4a073d8df3c7693a6fdbf0d"}, {"source": "security@huntr.dev", "tags": ["Exploit", "Patch", "Third Party Advisory"], "url": "https://huntr.dev/bounties/25775287-88cd-4f00-b978-692d627dff04"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch", "Third Party Advisory"], "url": "https://github.com/gnuboard/gnuboard5/commit/2e81619ea87bc9c0b4a073d8df3c7693a6fdbf0d"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Exploit", "Patch", "Third Party Advisory"], "url": "https://huntr.dev/bounties/25775287-88cd-4f00-b978-692d627dff04"}], "sourceIdentifier": "security@huntr.dev", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-79"}], "source": "security@huntr.dev", "type": "Secondary"}]}