CVE-2026-54221
Reflected XSS in UBB.threads
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.
INFO
Published Date :
June 18, 2026, 12:56 p.m.
Last Modified :
June 18, 2026, 12:56 p.m.
Remotely Exploit :
Yes !
Source :
CERT-PL
Affected Products
The following products are affected by CVE-2026-54221
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 4.0 | MEDIUM | 4bb8329e-dd38-46c1-aafb-9bf32bcb93c6 |
Solution
- Sanitize all user-supplied input.
- Validate input against expected formats.
- Encode output before rendering in HTML.
- Update the application to the latest version.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-54221 vulnerability anywhere in the article.
-
cert.pl
Vulnerabilities in UBB.threads software
Vulnerabilities in UBB.threads software CVE ID CVE-2026-54219 Publication date 18 June 2026 Vendor UBB Systems Product UBB.threads Vulnerable versions All through 7.7.5 Vulnerability type (CWE) Improp ... Read more