{"id":"CVE-2025-24018","aliases":["GHSA-w59h-3x3q-3p6j"],"url":"https://o3.security/vulnerability/CVE-2025-24018","summary":"YesWiki Vulnerable to Authenticated Stored XSS","details":"YesWiki is a wiki system written in PHP. In versions up to and including 4.4.5, it is possible for an authenticated user with rights to edit/create a page or comment to trigger a stored XSS which will be reflected on any page where the resource is loaded. The vulnerability makes use of the content edition feature and more specifically of the `{{attach}}` component allowing users to attach files/medias to a page. When a file is attached using the `{{attach}}` component, if the resource contained in the `file` attribute doesn't exist, then the server will generate a file upload button containing the filename. This vulnerability allows any malicious authenticated user that has the right to create a comment or edit a page to be able to steal accounts and therefore modify pages, comments, permissions, extract user data (emails), thus impacting the integrity, availability and confidentiality of a YesWiki instance. Version 4.5.0 contains a patch for the issue.","published":"2025-01-21T17:02:04.924Z","modified":"2026-08-08T03:48:11.481776786Z","cvss":{"score":7.6,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:L"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Packagist","name":"yeswiki/yeswiki","fixedVersion":"4.5.0"}],"fix":{"url":"https://github.com/YesWiki/yeswiki/commit/c1e28b59394957902c31c850219e4504a20db98b","label":"YesWiki/yeswiki@c1e28b5"},"references":[{"type":"WEB","url":"https://github.com/YesWiki/yeswiki/blob/v4.4.5/tools/attach/libs/attach.lib.php#L660"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/24xxx/CVE-2025-24018.json"},{"type":"ADVISORY","url":"https://github.com/YesWiki/yeswiki/security/advisories/GHSA-w59h-3x3q-3p6j"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-24018"},{"type":"FIX","url":"https://github.com/YesWiki/yeswiki/commit/c1e28b59394957902c31c850219e4504a20db98b"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-08T03:48:11.481776786Z"}}