CVE-2026-14449

POST-based reflected XSS via the thanks parameter in form components

State: Published
Severity: 6.4 Medium
Published: Jul 2, 2026
Updated: Jul 2, 2026
Reserved: Jul 2, 2026

Description

u5CMS through v12.8.8 is vulnerable to reflected XSS via the ‘thanks’ parameter in multiple form components

Scores

CVSS	Score	Vector	Source
4.0	6.4 Medium	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N/SC:H/SI:H/SA:H	NCSC.ch

Weaknesses

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

Affected Products

Product	Versions
u5CMSu5CMS	12.8.8 and earlierAffected

References

https://github.com/u5cms/u5cms/releases/tag/v12.8.9

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