CVE-2026-16889 | CVSS: N/A
In openEQUELLA before 2026.1, the pre-login notice image upload endpoint (PUT /api/preloginnotice/image/{name}) does not validate the type of uploaded files and serves them with a Content-Type derived from the supplied filename. A user holding the EDIT_SYSTEM_SETTINGS permission can upload an HTML file that is then served as text/html from the openEQUELLA origin, resulting in stored cross-site scripting. Unauthenticated exploitation is possible where EDIT_SYSTEM_SETTINGS has been granted to the guest user or everyone.
参考链接:
• https://github.com/openequella/openEQUELLA/security/advisories/GHSA-q2xv-rffq-mj
• https://openequella.github.io/guides/
📌 数据来源: NVD 官方
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