CVE-2021-3767 - Vulnerability Details - OpenCVE

ReportizFlow

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

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

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact Low

Integrity Impact Low

Availability Impact None

User Interaction None

Access Vector Network

Access Complexity Medium

Authentication Single

Confidentiality Impact None

Integrity Impact Partial

Availability Impact None

AV:N/AC:M/Au:S/C:N/I:P/A:N

This CVE is not in the KEV list.

Key SSVC decision points have not yet been added.

Vendors	Products
Bookstackapp	Bookstack

Configuration 1 [-]

cpe:2.3:a:bookstackapp:bookstack:*:*:*:*:*:*:*:*

No data.

References

Link	Providers
https://github.com/bookstackapp/bookstack/commit/040997fdc4414776bcac06a3cbaac3b26b5e8a64
https://huntr.dev/bounties/7ec92c85-30eb-4071-8891-6183446ca980

History

No history.

MITRE

Status: PUBLISHED

Assigner: @huntrdev

Published: 2021-09-06T11:17:17.000Z

Updated: 2024-08-03T17:09:08.832Z

Reserved: 2021-09-04T00:00:00.000Z

Link: CVE-2021-3767

Vulnrichment

No data.

NVD

Status : Modified

Published: 2021-09-06T12:15:08.237

Modified: 2026-06-17T04:05:43.553

Link: CVE-2021-3767

Redhat

No data.

{"containers": {"cna": {"affected": [{"product": "bookstackapp/bookstack", "vendor": "bookstackapp", "versions": [{"lessThan": "21.08.2", "status": "affected", "version": "unspecified", "versionType": "custom"}]}], "descriptions": [{"lang": "en", "value": "bookstack is vulnerable to Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')"}], "metrics": [{"cvssV3_0": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 5.4, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N", "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": "2021-09-06T11:17:17.000Z", "orgId": "c09c270a-b464-47c1-9133-acb35b22c19a", "shortName": "@huntrdev"}, "references": [{"tags": ["x_refsource_CONFIRM"], "url": "https://huntr.dev/bounties/7ec92c85-30eb-4071-8891-6183446ca980"}, {"tags": ["x_refsource_MISC"], "url": "https://github.com/bookstackapp/bookstack/commit/040997fdc4414776bcac06a3cbaac3b26b5e8a64"}], "source": {"advisory": "7ec92c85-30eb-4071-8891-6183446ca980", "discovery": "EXTERNAL"}, "title": "Cross-site Scripting (XSS) - Stored in bookstackapp/bookstack", "x_legacyV4Record": {"CVE_data_meta": {"ASSIGNER": "[email protected]", "ID": "CVE-2021-3767", "STATE": "PUBLIC", "TITLE": "Cross-site Scripting (XSS) - Stored in bookstackapp/bookstack"}, "affects": {"vendor": {"vendor_data": [{"product": {"product_data": [{"product_name": "bookstackapp/bookstack", "version": {"version_data": [{"version_affected": "<", "version_value": "21.08.2"}]}}]}, "vendor_name": "bookstackapp"}]}}, "data_format": "MITRE", "data_type": "CVE", "data_version": "4.0", "description": {"description_data": [{"lang": "eng", "value": "bookstack is vulnerable to Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')"}]}, "impact": {"cvss": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 5.4, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N", "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/7ec92c85-30eb-4071-8891-6183446ca980", "refsource": "CONFIRM", "url": "https://huntr.dev/bounties/7ec92c85-30eb-4071-8891-6183446ca980"}, {"name": "https://github.com/bookstackapp/bookstack/commit/040997fdc4414776bcac06a3cbaac3b26b5e8a64", "refsource": "MISC", "url": "https://github.com/bookstackapp/bookstack/commit/040997fdc4414776bcac06a3cbaac3b26b5e8a64"}]}, "source": {"advisory": "7ec92c85-30eb-4071-8891-6183446ca980", "discovery": "EXTERNAL"}}}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-03T17:09:08.832Z"}, "title": "CVE Program Container", "references": [{"tags": ["x_refsource_CONFIRM", "x_transferred"], "url": "https://huntr.dev/bounties/7ec92c85-30eb-4071-8891-6183446ca980"}, {"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://github.com/bookstackapp/bookstack/commit/040997fdc4414776bcac06a3cbaac3b26b5e8a64"}]}]}, "cveMetadata": {"assignerOrgId": "c09c270a-b464-47c1-9133-acb35b22c19a", "assignerShortName": "@huntrdev", "cveId": "CVE-2021-3767", "datePublished": "2021-09-06T11:17:17.000Z", "dateReserved": "2021-09-04T00:00:00.000Z", "dateUpdated": "2024-08-03T17:09:08.832Z", "state": "PUBLISHED"}, "dataType": "CVE_RECORD", "dataVersion": "5.1"}

{"affected": [{"affectedData": [{"product": "bookstackapp/bookstack", "vendor": "bookstackapp", "versions": [{"lessThan": "21.08.2", "status": "affected", "version": "unspecified", "versionType": "custom"}]}], "source": "[email protected]"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:bookstackapp:bookstack:*:*:*:*:*:*:*:*", "matchCriteriaId": "44F3B660-3A50-479D-9262-E08C2DA3E004", "versionEndExcluding": "21.08.2", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "bookstack is vulnerable to Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')"}, {"lang": "es", "value": "bookstack es vulnerable a una Neutralizaci\u00f3n Inapropiada de Entradas Durante la Generaci\u00f3n de P\u00e1ginas Web (\"Cross-site Scripting\")"}], "id": "CVE-2021-3767", "lastModified": "2026-06-17T04:05:43.553", "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": "[email protected]", "type": "Primary", "userInteractionRequired": true}], "cvssMetricV30": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 5.4, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N", "version": "3.0"}, "exploitabilityScore": 2.8, "impactScore": 2.5, "source": "[email protected]", "type": "Secondary"}], "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": "[email protected]", "type": "Primary"}]}, "published": "2021-09-06T12:15:08.237", "references": [{"source": "[email protected]", "tags": ["Patch", "Third Party Advisory"], "url": "https://github.com/bookstackapp/bookstack/commit/040997fdc4414776bcac06a3cbaac3b26b5e8a64"}, {"source": "[email protected]", "tags": ["Exploit", "Issue Tracking", "Patch", "Third Party Advisory"], "url": "https://huntr.dev/bounties/7ec92c85-30eb-4071-8891-6183446ca980"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch", "Third Party Advisory"], "url": "https://github.com/bookstackapp/bookstack/commit/040997fdc4414776bcac06a3cbaac3b26b5e8a64"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Exploit", "Issue Tracking", "Patch", "Third Party Advisory"], "url": "https://huntr.dev/bounties/7ec92c85-30eb-4071-8891-6183446ca980"}], "sourceIdentifier": "[email protected]", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-79"}], "source": "[email protected]", "type": "Secondary"}, {"description": [{"lang": "en", "value": "CWE-79"}], "source": "[email protected]", "type": "Primary"}]}