TI-2026-39128 Aliases CVE-2026-54224 GHSA-r4cc-xcx2-vp28

Denial of Service in UBB.threads

LOW 31CWE-405Published 2026-06-18 · Updated 2026-06-18

Key facts

Attack vector: Network
Privileges required: Low
User interaction: None
Attack complexity: Low
Attack requirements: None
Impact type: —
Confidentiality · integrity · availability: None · None · High
Fix status: No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA.

Summary

UBB.threads is vulnerable to Denial of Service (DoS). By sending multiple concurrent requests to view any user profile on instances with many registered users, an authenticated attacker can easily exhaust database resources and completely deny access to the application for other users. Because vendor contact attempts were unsuccessful, the vulnerability has only been confirmed in version 7.7.5 but may also affect other versions.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00272 19th percentileScored 2026-11-07

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
UBB Systems	UBB.threads	up to 7.7.5	—	No fix listed	CNA

UBB.threads VendorUBB Systems Affected up to 7.7.5 Fixed in — No fix listed CNA

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2026-54224
2026-10-03 Alias added: GHSA-r4cc-xcx2-vp28

References

Advisory 1

https://cert.pl/en/posts/2026/06/CVE-2026-54219

Other 1

https://www.ubbcentral.com/

TI-2026-39127 Remote Code Execution via arbitrary file read and write in UBB.threads CVSS 4.0HIGH 8.6
TI-2026-39126 Blind SQL Injection in UBB.threads CVSS 4.0HIGH 8.6
TI-2026-39124 Cross-Site Request Forgery in UBB.threads CVSS 4.0HIGH 8.6
TI-2026-39125 Reflected XSS in UBB.threads CVSS 4.0MEDIUM 5.1
TI-2026-39123 Stored XSS in UBB.threads CVSS 4.0MEDIUM 5.1

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences