Reflected XSS Vulnerability in u5CMS by u5cms
CVE-2026-14449

6.4MEDIUM

Key Information:

Vendor

U5cms

Status
U5cms
Vendor
CVE Published:
2 July 2026

What is CVE-2026-14449?

u5CMS versions up to and including v12.8.8 are susceptible to a reflected XSS vulnerability through the 'thanks' parameter found in several form components. This weakness could allow an attacker to inject malicious scripts into web pages viewed by users, potentially leading to unauthorized actions or data exposure.

Affected Version(s)

u5CMS 0 <= 12.8.8

References

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

CVSS V4

Score:
6.4
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
Unknown

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Pierre-Yves Guerder
.