{"id":"CVE-2026-42887","state":"PUBLISHED","title":"Audiobookshelf: Stored Cross-Site Scripting in Login Page Custom Message","description":"Audiobookshelf is a self-hosted audiobook and podcast server. Prior to 2.33.0, a stored cross-site scripting (XSS) vulnerability exists in the Login Page due to improper sanitization of the authLoginCustomMessage field of the /api/auth-settings endpoint. An attacker with administrative privileges can inject arbitrary HTML/JavaScript that will be rendered on the login page for all users. This vulnerability is fixed in 2.33.0.","publishedAt":"2026-05-11T19:55:32.090Z","updatedAt":"2026-05-12T13:29:46.446Z","severity":{"score":4.5,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:N/A:N","source":"GitHub_M"},"assigner":"GitHub_M","products":["advplyr audiobookshelf"],"affected":[{"vendor":"advplyr","product":"audiobookshelf","versions":[{"version":"< 2.33.0","status":"affected"}]}],"references":["https://github.com/advplyr/audiobookshelf/security/advisories/GHSA-cx29-ghq2-9cm4"],"weaknesses":["CWE-79"],"ingestedAt":"2026-10-29T20:11:57.932Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/42xxx/CVE-2026-42887.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-42887","state":"PUBLISHED","datePublished":"2026-05-11T19:55:32.090Z","dateUpdated":"2026-05-12T13:29:46.446Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-04-30T18:49:06.712Z"},"containers":{"cna":{"title":"Audiobookshelf: Stored Cross-Site Scripting in Login Page Custom Message","descriptions":[{"lang":"en","value":"Audiobookshelf is a self-hosted audiobook and podcast server. Prior to 2.33.0, a stored cross-site scripting (XSS) vulnerability exists in the Login Page due to improper sanitization of the authLoginCustomMessage field of the /api/auth-settings endpoint. An attacker with administrative privileges can inject arbitrary HTML/JavaScript that will be rendered on the login page for all users. This vulnerability is fixed in 2.33.0."}],"affected":[{"vendor":"advplyr","product":"audiobookshelf","versions":[{"version":"< 2.33.0","status":"affected"}]}],"references":[{"url":"https://github.com/advplyr/audiobookshelf/security/advisories/GHSA-cx29-ghq2-9cm4","name":"https://github.com/advplyr/audiobookshelf/security/advisories/GHSA-cx29-ghq2-9cm4","tags":["x_refsource_CONFIRM"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":4.5,"baseSeverity":"MEDIUM","confidentialityImpact":"HIGH","integrityImpact":"NONE","privilegesRequired":"HIGH","scope":"UNCHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:N/A:N","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-79","lang":"en","description":"CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-05-11T19:55:32.090Z"},"source":{"advisory":"GHSA-cx29-ghq2-9cm4","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","references":[{"url":"https://github.com/advplyr/audiobookshelf/security/advisories/GHSA-cx29-ghq2-9cm4","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-05-12T13:29:23.417280Z","id":"CVE-2026-42887","options":[{"Exploitation":"poc"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-05-12T13:29:46.446Z"}}]}}}