CVE-2026-54219
Stored XSS in UBB.threads
- State
- Published
- Severity
- 5.1 Medium
- Published
- Jun 18, 2026
- Updated
- Jun 18, 2026
- Reserved
- Jun 12, 2026
Description
UBB.threads is vulnerable to Stored XSS via user posts and user profile fields. The application fails to properly sanitize user input, allowing low privileged attackers to inject arbitrary JavaScript that executes in a victim's browser upon viewing.
Because vendor contact attempts were unsuccessful, the vulnerability has only been confirmed in version 7.7.5 but may also affect other versions.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 5.1 Medium | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:L/VA:N/SC:L/SI:L/SA:N | CERT-PL |
Weaknesses
- CWE-79 Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting')
Affected Products
| Product | Versions |
|---|---|
UBB.threadsUBB Systems |
|
References
- https://www.ubbcentral.com/product
- https://cert.pl/en/posts/2026/06/CVE-2026-54219third-party-advisory
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