{"id":"CVE-2026-109206","published":"2026-10-12T14:17:11.427","lastModified":"2026-10-13T20:41:35.943","description":"LogicalDOC Community Edition through 9.3 contains a username enumeration vulnerability that allows unauthenticated attackers to identify valid accounts because the AvatarServlet (/avatar) performs no session validation. Attackers can supply usernames or numeric IDs in the userId parameter and compare 1x1 transparent images against real avatars to enumerate users and retrieve profile pictures.","cvssScore":5.3,"cvssSeverity":"MEDIUM","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","cwes":["CWE-204"],"vendors":[],"products":[],"references":[{"url":"https://github.com/logicaldoc/community","tags":[]},{"url":"https://github.com/logicaldoc/community/blob/9.3/logicaldoc-webapp/src/main/java/com/logicaldoc/web/AvatarServlet.java#L63","tags":[]},{"url":"https://github.com/logicaldoc/community/commit/4e93a69526ae7fe50f670b85b3fc57181f3de3f7","tags":[]},{"url":"https://github.com/logicaldoc/community/discussions/119","tags":[]},{"url":"https://www.vulncheck.com/advisories/logicaldoc-community-edition-through-9.3-username-enumeration-via-avatarservlet","tags":[]}],"exploitRefs":[{"url":"https://github.com/logicaldoc/community","tags":[]},{"url":"https://github.com/logicaldoc/community/blob/9.3/logicaldoc-webapp/src/main/java/com/logicaldoc/web/AvatarServlet.java#L63","tags":[]},{"url":"https://github.com/logicaldoc/community/commit/4e93a69526ae7fe50f670b85b3fc57181f3de3f7","tags":[]},{"url":"https://github.com/logicaldoc/community/discussions/119","tags":[]}],"hasPoc":true,"ai":null}