CVE-2026-18430

Description

HumHub 1.18.4 contains a stored cross-site scripting vulnerability in the comment-deletion notification flow. A Space administrator can delete another user's comment, choose to notify the original author, and place HTML/JavaScript in the deletion reason.

References

• https://fluidattacks.com/es/advisories/personajes
• https://github.com/humhub/humhub
• https://github.com/humhub/humhub/pull/8365
• https://fluidattacks.com/es/advisories/personajes