{"id":"CVE-2026-55562","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-55562","generatedAt":"2026-10-28T04:15:08.935Z","title":"Prior to 0.9.119, the administrator Activity Log in htdocs/js/pages/admin/Activity.js concatenates the attacker-controlled item.user.full_name value into HTML without applying encode_entities and inserts the result through this.div.html.","description":"Cronicle is a multi-server task scheduler and runner, with a web based front-end UI. Prior to 0.9.119, the administrator Activity Log in htdocs/js/pages/admin/Activity.js concatenates the attacker-controlled item.user.full_name value into HTML without applying encode_entities and inserts the result through this.div.html. The bundled pixl-server-user input filter can be bypassed by a tag containing a line break because its regular expression does not match newlines. An authenticated non-administrator can update the attacker's own name through /api/user/update using a valid session and current password; when free_accounts is enabled, an anonymous attacker can instead plant the name during self-registration. The stored name executes script in an administrator's session when the Activity Log is opened, enabling administrator takeover and subsequent command execution through privileged Cronicle features. This issue is fixed in version 0.9.119.","published":"2026-10-13T17:17:42.000Z","lastModified":"2026-10-16T23:17:02.000Z","status":"Deferred","sourceIdentifier":"security-advisories@github.com","cvss":{"version":"3.1","score":9,"severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H"},"cwe":["CWE-79"],"affected":[],"epss":{"score":0.00463,"percentile":0.39959,"date":"2026-10-27","history":[{"date":"2026-10-14","score":0.00368,"percentile":0.29024}]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (0.46%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[{"kind":"new","label":"New CVE","at":"2026-10-13T17:17:42.000Z","detail":{"score":"9.0","severity":"CRITICAL","publishedAt":"2026-10-13T17:17:42.040Z"},"summary":"New CVE, critical severity (CVSS 9.0)."}],"references":[{"url":"https://github.com/jhuckaby/Cronicle/commit/8b60eb5b041614ab661df50e58e612f5e42a7d30","source":"security-advisories@github.com"},{"url":"https://github.com/jhuckaby/Cronicle/releases/tag/v0.9.119","source":"security-advisories@github.com"},{"url":"https://github.com/jhuckaby/Cronicle/security/advisories/GHSA-vh39-3pcm-2j63","source":"security-advisories@github.com"},{"url":"https://github.com/jhuckaby/Cronicle/security/advisories/GHSA-vh39-3pcm-2j63","source":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-55562","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}