CVE-2026-93769

HumHub 1.18.5 - Stored XSS in Profile Field Category title via HForm#renderForm leading to System Administrator account takeover

State: Published
Severity: 7.2 High
Published: Sep 23, 2026
Updated: Sep 23, 2026
Reserved: Sep 18, 2026

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Description

HumHub 1.18.5 is affected by a stored cross-site scripting (XSS) vulnerability that allows any user holding the delegated, non-system-administrator Manage Users permission (admin_manage_users) to inject persistent HTML/JavaScript into a Profile Field Category title.

Scores

CVSS	Score	Vector	Source
4.0	7.2 High	CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:P/VC:H/VI:H/VA:N/SC:L/SI:L/SA:N	Fluid Attacks

Weaknesses

CWE-79 Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting')

Affected Products

Product	Versions
HumhubHumhub	1.18.5Affected

References

https://fluidattacks.com/advisories/calithird-party-advisory
https://github.com/humhub/humhubproduct
https://github.com/humhub/humhub/pull/8499patch

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