{"id":"CVE-2026-55085","summary":"Etherpad: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in etherpad-lite","details":"Etherpad is a real-time collaborative editor. Prior to 3.3.1, result.appendSpan in src/static/js/domline.ts interpolates the start attribute of a numbered list directly into an unquoted ol start attribute before assigning the generated markup to node.innerHTML. ImportEtherpad.setPadRaw in src/node/utils/ImportEtherpad.ts accepts attacker-controlled attribute-pool values from a crafted .etherpad import, including list:number1 and a malicious start value. Any user with write access to a pad can store markup that executes as cross-site scripting when another user opens the pad or /timeslider, including when an administrator views the pad. This issue is fixed in version 3.3.1.","aliases":["GHSA-f7h5-v9hm-548j"],"modified":"2026-08-23T03:42:45.745883872Z","published":"2026-08-19T19:34:27.269Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55085.json","cna_assigner":"GitHub_M","cwe_ids":["CWE-79"]},"references":[{"type":"WEB","url":"https://github.com/ether/etherpad/releases/tag/v3.3.1"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55085.json"},{"type":"ADVISORY","url":"https://github.com/ether/etherpad/security/advisories/GHSA-f7h5-v9hm-548j"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-55085"},{"type":"FIX","url":"https://github.com/ether/etherpad/commit/d828185efcac9abc2e46e6da1c171393500fa319"},{"type":"FIX","url":"https://github.com/ether/etherpad/pull/7937"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/ether/etherpad","events":[{"introduced":"0"},{"fixed":"d828185efcac9abc2e46e6da1c171393500fa319"},{"fixed":"92e23bf7d40473b9116abd5cb9278f860ded0479"}],"database_specific":{"extracted_events":[{"introduced":"0"},{"fixed":"3.3.1"}],"source":["AFFECTED_FIELD","REFERENCES"]}}],"versions":["v3.3.0","3.3.0","v3.2.0","3.2.0","v3.1.0","3.1.0","v3.0.0","3.0.0","v2.7.3","2.7.3","v2.7.2","2.7.2","v2.7.1","2.7.1","v2.7.0","2.7.0","v2.6.1","2.6.1","v2.6.0","2.6.0","v2.5.3","2.5.3","v2.5.1","2.5.1","v2.5.0","2.5.0","v2.4.2","2.4.2","v2.4.1","2.4.1","v2.4.0","2.4.0","v2.3.2","2.3.2","v2.3.1","2.3.1","v2.3.0","2.3.0","v2.2.7","2.2.7","v2.2.6","2.2.6","v2.2.5","2.2.5","v2.2.4","2.2.4","v2.2.3","2.2.3","v2.2.2","2.2.2","v2.2.1","2.2.1","v2.2.0","2.2.0","v2.1.1","2.1.1","v2.1.0","2.1.0","v2.0.3","2.0.3","v2.0.2","2.0.2","v2.0.1","2.0.1","v2.0.0","2.0.0","v1.9.7","1.9.7","v1.9.6","1.9.6","v1.9.5","1.9.5","v1.9.4","1.9.4","1.9.3","v1.9.3","1.9.2","v1.9.2","1.8.15","v1.9.1","1.9.1","v1.9.0","1.9.0","1.8.18","1.8.17","1.8.16","1.8.14","1.8.13","1.8.12","1.8.11","1.8.10","1.8.9","1.8.8","1.8.7","1.8.6","1.6.2","1.6.1","1.6.0","1.5.7","1.5.6","1.5.5","1.5.4","1.5.3","1.5.2","1.5.1","1.4.1","1.4.0","1.3.0","1.2.12","1.2.9","1.2.7","1.2.6","1.2.5","1.2.4","1.2.3","1.2.2","1.2.1","1.2.0","1.1.5","1.1.4","1.1.3","1.1.2","1.1.1","1.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-55085.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:L"}]}