{"id":"CVE-2025-53631","summary":"flaskBlog XSS Vulnerability in postContent","details":"flaskBlog is a blog app built with Flask. In versions 2.8.1 and prior, improper sanitization of postContent when submitting POST requests to /createpost leads to arbitrary JavaScript execution (XSS) on all pages the post is reflected on including /, /post/[ID], /admin/posts, and /user/[ID] of the user that made the post. At time of publication, there are no public patches available.","aliases":["GHSA-cj43-h8qf-7rw7"],"modified":"2026-04-10T05:30:53.349147Z","published":"2025-08-14T15:26:32.758Z","database_specific":{"cwe_ids":["CWE-79"],"cna_assigner":"GitHub_M","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/53xxx/CVE-2025-53631.json"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/53xxx/CVE-2025-53631.json"},{"type":"ADVISORY","url":"https://github.com/DogukanUrker/flaskBlog/security/advisories/GHSA-cj43-h8qf-7rw7"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-53631"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/dogukanurker/flaskblog","events":[{"introduced":"0"},{"last_affected":"a45d888e0b5ee56b19cf0489807f1a69c87346d7"}],"database_specific":{"versions":[{"introduced":"0"},{"last_affected":"2.8.1"}]}}],"versions":["1.0.0","1.0.1","1.0.2","1.0.3","1.0.4","1.0.5","1.0.6","1.0.7","1.0.8","1.0.9","1.1.0","2.0.0","2.0.1","2.0.10","2.0.11","2.0.12","2.0.2","2.0.3","2.0.4","2.0.5","2.0.6","2.0.7","2.0.8","2.0.9","2.1.0","2.1.1","2.1.2","2.1.3","2.1.4","2.2.0","2.2.1","2.3.0","2.4.0","2.5.0","2.6.0","2.8.1"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-53631.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:N/SI:L/SA:N"}]}