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CVE-2026-54805 sbouey CVE debrief

A high-severity vulnerability, CVE-2026-54805, was disclosed in the Falang multilanguage plugin, affecting versions up to 1.4.2. This vulnerability allows subscribers to escalate their privileges, potentially leading to unauthorized access and control. With a CVSS score of 8.8, this issue is considered high-risk. Users of the affected plugin should take immediate action to mitigate potential risks. The vulnerability was made public on June 17, 2026. No known ransomware campaigns have been associated with this vulnerability. Administrators should review their installations and update to a patched version if available.

Vendor
sbouey
Product
Falang multilanguage
CVSS
HIGH 8.8
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-17
Original CVE updated
2026-06-17
Advisory published
2026-06-17
Advisory updated
2026-06-17

Who should care

Administrators and users of the Falang multilanguage plugin, especially those with subscriber-level access, should be aware of this vulnerability. Given its high CVSS score, priority should be given to updating or mitigating the vulnerability to prevent potential privilege escalation attacks.

Technical summary

CVE-2026-54805 is a subscriber privilege escalation vulnerability in the Falang multilanguage plugin, affecting versions up to 1.4.2. The vulnerability has been assigned a CVSS score of 8.8, indicating high severity. It is categorized under CWE-266. The vulnerability allows a subscriber to escalate their privileges, which could lead to unauthorized access and control of the affected system. The CVSS vector is CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H, indicating that the vulnerability can be exploited over the network with low attack complexity and privileges.

Defensive priority

High

Recommended defensive actions

  • Update the Falang multilanguage plugin to a version that is not vulnerable (if available).
  • Restrict subscriber privileges to minimize potential impact.
  • Monitor plugin and system logs for suspicious activity.
  • Implement additional security measures to prevent unauthorized access.
  • Review and adjust user roles and permissions.
  • Consider using a Web Application Firewall (WAF) to detect and prevent attacks.
  • Regularly update and patch all plugins and software.

Evidence notes

The information provided is based on data from official sources, including the CVE.org and NVD. The CVE record and NVD detail pages provide comprehensive information about the vulnerability. Additional details can be found in the mitigation or vendor reference provided by Patchstack.

Official resources

public