CVE-2026-25735

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Versions prior to 35.8.3, 38.5.4, and 39.3.1 have a stored Cross-Site Scripting (XSS) vulnerability in the Identity Name of the WebUI where attacker-controlled input is persisted by the backend and later rendered in the WebUI without proper output encoding. This allows arbitrary JavaScript execution in the context of the WebUI for users who view affected pages, potentially enabling session token theft or unauthorized actions. Versions 35.8.3, 38.5.4, and 39.3.1 fix the issue."}, {"lang": "es", "value": "Rucio es un framework de software que proporciona funcionalidad para organizar, gestionar y acceder a grandes vol\u00famenes de datos cient\u00edficos utilizando pol\u00edticas personalizables. Las versiones anteriores a la 35.8.3, 38.5.4 y 39.3.1 tienen una vulnerabilidad de cross-site scripting (XSS) almacenado en el campo 'Identity Name' de la interfaz de usuario web (WebUI), donde la entrada controlada por el atacante es persistida por el backend y posteriormente renderizada en la WebUI sin una codificaci\u00f3n de salida adecuada. Esto permite la ejecuci\u00f3n arbitraria de JavaScript en el contexto de la WebUI para los usuarios que visualizan las p\u00e1ginas afectadas, lo que podr\u00eda permitir el robo de tokens de sesi\u00f3n o acciones no autorizadas. Las versiones 35.8.3, 38.5.4 y 39.3.1 solucionan el problema."}], "id": "CVE-2026-25735", "lastModified": "2026-06-17T10:25:08.137", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 6.1, "baseSeverity": "MEDIUM", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "HIGH", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:N", "version": "3.1"}, "exploitabilityScore": 0.9, "impactScore": 5.2, "source": "security-advisories@github.com", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 4.8, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "HIGH", "scope": "CHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 1.7, "impactScore": 2.7, "source": "nvd@nist.gov", "type": "Primary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-25735", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-02-26T16:00:30.360733Z", "version": "2.0.3"}}]}, "published": "2026-02-25T20:23:48.070", "references": [{"source": "security-advisories@github.com", "tags": ["Not Applicable"], "url": "https://cheatsheetseries.owasp.org/cheatsheets/Cross_Site_Scripting_Prevention_Cheat_Sheet.html"}, {"source": "security-advisories@github.com", "tags": ["Product", "Release Notes"], "url": "https://github.com/rucio/rucio/releases/tag/35.8.3"}, {"source": "security-advisories@github.com", "tags": ["Product", "Release Notes"], "url": "https://github.com/rucio/rucio/releases/tag/38.5.4"}, {"source": "security-advisories@github.com", "tags": ["Product", "Release Notes"], "url": "https://github.com/rucio/rucio/releases/tag/39.3.1"}, {"source": "security-advisories@github.com", "tags": ["Exploit", "Vendor Advisory"], "url": "https://github.com/rucio/rucio/security/advisories/GHSA-8wpv-6x3f-3rm5"}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "tags": ["Exploit", "Vendor Advisory"], "url": "https://github.com/rucio/rucio/security/advisories/GHSA-8wpv-6x3f-3rm5"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-79"}, {"lang": "en", "value": "CWE-1004"}], "source": "security-advisories@github.com", "type": "Secondary"}, {"description": [{"lang": "en", "value": "CWE-79"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,35.8.3)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[36.0.0rc1,38.5.4)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[39.0.0rc1,39.3.1)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "cna", "scores": [{"score": 100.0, "source": "cna"}]}, "original": {"product": "rucio", "source": "cna", "vendor": "rucio"}, "product": "rucio", "vendor": "rucio"}], "analysis": {"en": {"generated_at": "2026-04-17T14:58:18.612788+00:00", "value": {"mitigation_remediation": ["Upgrade Rucio to version 35.8.3, 38.5.4, 39.3.1 or any newer release that incorporates the output\u2011encoding fix.", "If an immediate upgrade is not possible, disable the Identity Name field in the WebUI or enforce strict character validation to prevent rendering of user\u2011supplied content.", "Introduce generic output encoding or sanitization for all user\u2011controlled fields in the UI, ensuring that any dynamic content is properly escaped before display."], "summary": {"action": "Immediate Patch", "impact": "Stored Cross-site Scripting (XSS)"}, "threat_synthesis": {"affected_systems": "The flaw affects the Rucio framework. Versions older than 35.8.3, 38.5.4, or 39.3.1 are vulnerable. Systems running any of those release lines, especially the default distribution from CERN, are at risk.", "description_and_impact": "A stored Cross\u2011Site Scripting vulnerability exists in the WebUI of Rucio when an attacker supplies malicious content in the Identity Name field. The backend saves this data without proper output encoding, and the WebUI later displays it as plain text. If an impacted user views the affected page, the injected script executes in that user\u2019s browser, allowing the attacker to steal session cookies or perform actions on the user\u2019s behalf.", "risk_and_exploitability": "The CVSS score of 6.1 rates this vulnerability as medium severity. The EPSS figure indicates a very low but non\u2011zero probability of exploitation, and it is not listed in the CISA KEV catalog. Attackers would likely exploit the WebUI by inserting malicious code through the identity name input, then target users who subsequently view the affected pages. Successful exploitation leads to client\u2011side script execution, potentially compromising user sessions and allowing unauthorized actions."}}}}, "created": "2026-02-26T13:14:52.721215+00:00", "updated": "2026-04-17T15:00:11.036315+00:00", "vendors": ["rucio", "rucio$PRODUCT$rucio"]}