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CVE-2026-54220 UBB Systems CVE debrief

CVE-2026-54220 is a high-severity Cross-Site Request Forgery (CSRF) vulnerability in uBB.threads, allowing attackers to trick authenticated users into executing unintended actions. The vulnerability has a CVSS score of 8.6 and is considered HIGH severity. Due to unsuccessful vendor contact attempts, the vulnerability has only been confirmed in version 7.7.5, but may also affect other versions. This vulnerability enables attackers to manipulate user interactions, potentially leading to unauthorized actions. Organizations using uBB.threads should take immediate action to mitigate this risk.

Vendor
UBB Systems
Product
UBB.threads
CVSS
HIGH 8.6
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-18
Original CVE updated
2026-06-18
Advisory published
2026-06-18
Advisory updated
2026-06-18

Who should care

Administrators and users of uBB.threads, especially those with authenticated access, should be aware of this vulnerability. Developers and security teams should prioritize patching or mitigating this issue to prevent potential attacks.

Technical summary

The CVE-2026-54220 vulnerability is caused by a lack of protective mechanisms in uBB.threads, making it susceptible to Cross-Site Request Forgery (CSRF) attacks. An attacker can exploit this by crafting a malicious request that tricks an authenticated user into performing unintended actions. The vulnerability's CVSS vector is CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X, indicating a high impact on confidentiality and integrity.

Defensive priority

High

Recommended defensive actions

  • Apply the latest patch or update for uBB.threads, if available.
  • Implement additional CSRF protection mechanisms, such as token-based validation.
  • Monitor user interactions and system logs for suspicious activity.
  • Restrict user privileges to minimize potential damage.
  • Educate users about the risks of CSRF attacks and the importance of verifying requests.
  • Consider using a web application firewall (WAF) to detect and prevent CSRF attacks.
  • Review and update incident response plans to address potential CSRF-related incidents.

Evidence notes

The vulnerability was confirmed in version 7.7.5 of uBB.threads, but may also affect other versions. The CVE record and NVD detail provide additional information about the vulnerability. [see resourceLinkAnnotations for full list of links].

Official resources

public