CVE-2026-54221
Reflected 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 Reflected XSS. The application improperly handles user input in certain requests, enabling attackers to execute arbitrary JavaScript in the context of a victim's browser by tricking them into clicking a crafted link. 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:N/UI:A/VC:N/VI:N/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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