CVE-2026-54221 - Vulnerability Details - OpenCVE

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.

Attack Vector Network

Attack Complexity Low

Privileges Required None

Attack Requirements None

User Interaction Active

Vulnerable System Confidentiality Impact None

Vulnerable System Integrity Impact None

Vulnerable System Availability Impact None

Subsequent System Confidentiality Impact Low

Subsequent System Integrity Impact Low

Subsequent System Availability Impact None

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Exploitation none

Automatable no

Technical Impact partial

No data.

No data.

No data.

OpenCVE Enrichment is a feature of OpenCVE that uses AI to automatically link vendors and products to CVEs. Learn more on GitHub.

Vendors	Products

References

Link	Providers
https://cert.pl/en/posts/2026/06/CVE-2026-54219
https://www.ubbcentral.com/

History

Thu, 18 Jun 2026 16:45:00 +0000

Type	Values Removed	Values Added
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.
Title		Reflected XSS in UBB.threads
Weaknesses		CWE-79
References		https://cert.pl/en/posts/2026/06/CVE-2026-54219 https://www.ubbcentral.com/
Metrics		cvssV4_0 `{'score': 5.1, 'vector': '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'}` ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

MITRE

Status: PUBLISHED

Assigner: CERT-PL

Published: 2026-06-18T12:56:19.811Z

Updated: 2026-06-18T13:30:11.277Z

Reserved: 2026-06-12T11:03:23.916Z

Link: CVE-2026-54221

Vulnrichment

Updated: 2026-06-18T13:29:57.168Z

NVD

No data.

Redhat

No data.

OpenCVE Enrichment

Updated: 2026-06-18T20:30:05Z

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