GHSA-fh48-f69w-7vmp

MantisBT Vulnerable to Stored HTML Injection in Tag Delete Confirmation

Source: GitHub Advisory Database (reviewed) High CVE-2026-33517

Packages

Ecosystem	Package	Affected	Fixed in
Packagist	mantisbt/mantisbt	>= 2.28.0, < 2.28.1	2.28.1

Details

As written in the advisory (Markdown source, shown as plain text).

Improper escaping of Tag name when deleting it in tag_delete.php allows an attacker to inject HTML and, if CSP settings permit, achieve execution of arbitrary JavaScript. ### Impact Cross-site scripting (XSS). ### Patches 80990f43153167c73f11eb4b2bc7108d0c3d6b46 ### Workarounds * Revert commit d6890320752ecf37bd74d11fe14fe7dc12335be9 * Manually edit language files to remove the sprintf placeholder `%1$s` from *$s_tag_delete_message* string, for example with `sed -r -i '/tag_delete_message/s/.%1\$s.//' -- lang/` ### Credits MantisBT hanks Vishal Shukla for discovering and responsibly reporting the issue.

References

External links from the advisory. They lead to third-party sites.