CVE-2026-54219CWE-79

Stored XSS in UBB.threads

Medium · published June 18, 2026

CVSS v4.0
5.1
EPSS
0%
Percentile
33.6
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v4.0
5.1 · MEDIUM
Vector
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
EPSS
0.00405 · 33.6th percentile
Weakness
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Published
2026-06-18T12:56Z
EPSS history
Timeline
  • 18 JUN 12:56Z
    Stored XSS in UBB.threads
    cvelistv5