Stored Cross-Site Scripting Vulnerability in WP Multilang Plugin for WordPress
CVE-2026-15731

6.4MEDIUM

Key Information:

Vendor

WordPress
Status
WP Multilang – Translation And Multilingual Plugin
Vendor
CVE Published:
24 September 2026

What is CVE-2026-15731?

The WP Multilang – Translation and Multilingual Plugin for WordPress has a vulnerability that enables stored cross-site scripting (XSS) attacks. This issue arises from inadequate input sanitization and output escaping, allowing authenticated attackers with Contributor-level access and above to inject malicious scripts into the post content. Consequently, when users access injected pages, these scripts execute, potentially compromising user data and security. This vulnerability affects all versions of the plugin up to and including 2.4.31, emphasizing the critical need for users to apply patches and mitigate risk.

Affected Version(s)

WP Multilang – Translation and Multilingual Plugin 0 <= 2.4.31

References

https://www.wordfence.com/threat-intel/vulnerabilities/id...
https://plugins.trac.wordpress.org/changeset/3637485/

CVSS V3.1

Score:
6.4
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Athiwat Tiprasaharn (Jitlada)
Itthidej Aramsri (Boeing777)
.