CVE-2026-30587

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{"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:seafile:seafile_server:*:*:*:*:professional:*:*:*", "matchCriteriaId": "79197CA1-6A7E-4165-AD57-982C8824B82C", "versionEndExcluding": "12.0.20", "vulnerable": true}, {"criteria": "cpe:2.3:a:seafile:seafile_server:13.0.15:*:*:*:community:*:*:*", "matchCriteriaId": "ECCCED4B-9663-4BC1-BD35-995B3DCDAC95", "vulnerable": true}, {"criteria": "cpe:2.3:a:seafile:seafile_server:13.0.16:*:*:*:professional:*:*:*", "matchCriteriaId": "880080C5-9A1A-4D9B-83AB-33D8C21FCF38", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Multiple Stored XSS vulnerabilities exist in Seafile Server version 13.0.15,13.0.16-pro,12.0.14 and prior and fixed in 13.0.17, 13.0.17-pro, and 12.0.20-pro, via the Seadoc (sdoc) editor. The application fails to properly sanitize WebSocket messages regarding document structure updates. This allows authenticated remote attackers to inject malicious JavaScript payloads via the src attribute of embedded Excalidraw whiteboards or the href attribute of anchor tags"}, {"lang": "es", "value": "M\u00faltiples vulnerabilidades de XSS Almacenado existen en Seafile Servidor versi\u00f3n 13.0.15, 13.0.16-pro, 12.0.14 y anteriores, y fueron corregidas en 13.0.17, 13.0.17-pro y 12.0.20-pro, a trav\u00e9s del editor Seadoc (sdoc). La aplicaci\u00f3n no logra sanear correctamente los mensajes de WebSocket relacionados con las actualizaciones de la estructura del documento. Esto permite a atacantes remotos autenticados inyectar cargas \u00fatiles maliciosas de JavaScript a trav\u00e9s del atributo src de las pizarras blancas incrustadas de Excalidraw o el atributo href de las etiquetas de anclaje."}], "id": "CVE-2026-30587", "lastModified": "2026-06-17T10:32:49.470", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 8.7, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "CHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N", "version": "3.1"}, "exploitabilityScore": 2.3, "impactScore": 5.8, "source": "nvd@nist.gov", "type": "Primary"}, {"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": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-30587", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-03-27T19:39:14.665567Z", "version": "2.0.3"}}]}, "published": "2026-03-25T18:16:31.793", "references": [{"source": "cve@mitre.org", "tags": ["Exploit", "Third Party Advisory"], "url": "https://gist.github.com/gabdevele/1b7e30ab367b26042fa32f45aa12ce2f"}, {"source": "cve@mitre.org", "tags": ["Patch"], "url": "https://github.com/haiwen/seadoc-editor/commit/8fa988aaede072b2ae073d1b2edcb2fc691423b2"}, {"source": "cve@mitre.org", "tags": ["Patch"], "url": "https://github.com/haiwen/seahub/commit/4c5301747bdb84c64b2f2b3230417df2d1cc8987"}, {"source": "cve@mitre.org", "tags": ["Release Notes"], "url": "https://manual.seafile.com/12.0/changelog/changelog-for-seafile-professional-server/"}, {"source": "cve@mitre.org", "tags": ["Release Notes"], "url": "https://manual.seafile.com/13.0/changelog/changelog-for-seafile-professional-server/"}, {"source": "cve@mitre.org", "tags": ["Release Notes"], "url": "https://manual.seafile.com/13.0/changelog/server-changelog/"}], "sourceIdentifier": "cve@mitre.org", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-79"}], "source": "nvd@nist.gov", "type": "Primary"}, {"description": [{"lang": "en", "value": "CWE-79"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

{"bugzilla": {"description": "Seafile Server: Seadoc editor: seahub: seadoc-editor: Seafile Server: Arbitrary client-side code execution via Stored Cross-Site Scripting in Seadoc editor", "id": "2451404", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2451404"}, "csaw": false, "cvss3": {"cvss3_base_score": "6.3", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:L/A:N", "status": "draft"}, "cwe": "CWE-79", "details": ["A flaw was found in Seafile Server and its Seadoc editor. This Stored Cross-Site Scripting (XSS) vulnerability allows authenticated remote attackers to inject malicious JavaScript code. The application fails to properly sanitize WebSocket messages during document structure updates. By exploiting this, an attacker can execute arbitrary client-side scripts, potentially leading to information disclosure or unauthorized actions within a user's browser."], "name": "CVE-2026-30587", "public_date": "2026-03-25T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-30587\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-30587\nhttps://gist.github.com/gabdevele/1b7e30ab367b26042fa32f45aa12ce2f\nhttps://github.com/haiwen/seadoc-editor/commit/8fa988aaede072b2ae073d1b2edcb2fc691423b2\nhttps://github.com/haiwen/seahub/commit/4c5301747bdb84c64b2f2b3230417df2d1cc8987\nhttps://manual.seafile.com/12.0/changelog/changelog-for-seafile-professional-server/\nhttps://manual.seafile.com/13.0/changelog/changelog-for-seafile-professional-server/\nhttps://manual.seafile.com/13.0/changelog/server-changelog/"], "statement": "This MODERATE stored XSS vulnerability in Seafile Server's Seadoc editor allows authenticated users to inject malicious scripts via unsanitized WebSocket messages. Exploitation requires low privileges (any authenticated user) and user interaction (victim views document). Impact is high to confidentiality and integrity. Affects Seafile Server 13.0.15, 13.0.16-pro, 12.0.14 and prior. Fixed in 13.0.17, 13.0.17-pro, and 12.0.20-pro.", "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,13.0.17)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "manual", "scores": [{"score": 100.0, "source": "manual"}]}, "product": "seafile", "vendor": "seafile"}], "analysis": {"en": {"generated_at": "2026-03-31T20:52:06.639518+00:00", "value": {"mitigation_remediation": ["Upgrade Seafile Server to a fixed release (13.0.17, 13.0.17\u2011pro, or 12.0.20\u2011pro) as soon as possible.", "If an upgrade is not feasible, disable embedding of Excalidraw whiteboards or strip the src attribute of injected elements and the href attribute of anchor tags in shared Seadoc documents, or otherwise sanitize user\u2011supplied content.", "Implement a Content Security Policy that blocks inline scripts and restricts script execution to trusted origins.", "Monitor server logs for unusual WebSocket traffic or unexpected script insertion in documents and review shared content for suspicious changes."], "summary": {"action": "Apply Patch", "impact": "Client\u2011side code execution via XSS"}, "threat_synthesis": {"affected_systems": "The vulnerability affects Seafile Server from the vendor Seafile, including all community and professional editions up to and including version 13.0.15, 13.0.16\u2011pro, and 12.0.14. The issue was fixed in releases 13.0.17, 13.0.17\u2011pro, and 12.0.20\u2011pro, as well as later builds.", "description_and_impact": "Seafile Server releases 13.0.15, 13.0.16\u2011pro, 12.0.14 and earlier contain stored cross\u2011site scripting weaknesses in the Seadoc editor. The application does not sanitize certain WebSocket messages that describe document structure updates, allowing an authenticated remote user to embed malicious JavaScript through the src attribute of an Excalidraw whiteboard or the href attribute of an anchor tag. When another user opens or edits the affected document, the injected script runs in the victim\u2019s browser.", "risk_and_exploitability": "The CVSS score is 5.4, indicating moderate severity, while the EPSS score is below 1%, suggesting a low likelihood of exploitation in the wild. The vulnerability is not listed in the CISA Known Exploited Vulnerabilities catalog. Exploitation requires a legitimate user to inject the payload into a Seadoc document; the attacker then relies on other users opening that document to trigger the injected code. The impact is limited to client-side code execution, which could affect the user\u2019s browser session."}}}}, "created": "2026-03-25T20:56:59.379162+00:00", "updated": "2026-04-02T07:59:22.380041+00:00", "vendors": ["seafile", "seafile$PRODUCT$seafile"]}