CVE-2026-54224
Deferred Deferred - Pending Action

Denial of Service in UBB.threads

Vulnerability report for CVE-2026-54224, including description, CVSS score, EPSS score, affected products, exploitability, helpful resources, and attack-flow context.

Publication date: 2026-06-18

Last updated on: 2026-06-18

Assigner: CERT.PL

Description

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.

CVSS Scores

EPSS Scores

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Meta Information

Published
2026-06-18
Last Modified
2026-06-18
Generated
2026-07-09
AI Q&A
2026-06-18
EPSS Evaluated
2026-07-08
NVD
EUVD

Affected Vendors & Products

Showing 2 associated CPEs
Vendor Product Version / Range
ubbthreads ubbthreads From 7.7.5 (exc)
ubbt ubb_threads From 7.7.5 (exc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-405 The product does not properly control situations in which an adversary can cause the product to consume or produce excessive resources without requiring the adversary to invest equivalent work or otherwise prove authorization, i.e., the adversary's influence is "asymmetric."

Attack-Flow Graph

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Executive Summary

The vulnerability in UBB.threads is a Denial of Service (DoS) issue. An authenticated attacker can send multiple concurrent requests to view user profiles on instances with many registered users. This overloads the database resources, causing the application to become unavailable to other users.

Impact Analysis

This vulnerability can impact you by allowing an attacker to exhaust the database resources of the UBB.threads application. As a result, legitimate users may be completely denied access to the application, leading to service disruption and potential loss of availability.

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EPSS Chart