PT-2026-50670 · Ubb Systems · Ubb.Threads

Kamil Szczurowski + 1 · Published 2026-06-18 · Updated 2026-06-18 · CVE-2026-54221

Positive Technologies (AI Summary)

CVSS v4.0

5.1

Medium

Base vector

AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N

Name of the Vulnerable Software and Affected Versions UBB.threads version 7.7.5

Description Reflected Cross-Site Scripting (XSS) occurs when the application improperly handles user input in certain requests. This allows attackers to execute arbitrary JavaScript in a victim's browser by tricking them into clicking a crafted link.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2026-54221

Affected Products

Ubb.Threads

References · 4

• https://nvd.nist.gov/vuln/detail/CVE-2026-54221 · Security Note
• https://ubbcentral.com · Note
• https://cert.pl/en/posts/2026/06/CVE-2026-54219 · Note
• https://twitter.com/VulmonFeeds/status/2067640218778234882 · Twitter Post