CVE-2026-15066: Loco Translate <= 2.8.7 - Authenticated (Translator+) Stored Cross-Site Scripting via PO File Extracted Comments

Severity: medium (CVSS 6.4 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-08-16 · updated 2026-08-20
Weakness: CWE-79

Description

The Loco Translate plugin for WordPress is vulnerable to Stored Cross-Site Scripting via PO File Extracted Comments in all versions up to, and including, 2.8.7 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with translator-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

Affected products

timwhitlock Loco Translate: through 2.8.7

References

https://plugins.trac.wordpress.org/browser/loco-translate/tags/2.8.4/pub/js/min/admin.js#L1404
https://plugins.trac.wordpress.org/browser/loco-translate/tags/2.8.4/pub/js/min/admin.js#L3533
https://plugins.trac.wordpress.org/browser/loco-translate/tags/2.8.4/src/ajax/SaveController.php#L52
https://plugins.trac.wordpress.org/browser/loco-translate/tags/2.8.5/pub/js/min/admin.js#L1404
https://plugins.trac.wordpress.org/browser/loco-translate/tags/2.8.5/pub/js/min/admin.js#L3533
https://plugins.trac.wordpress.org/browser/loco-translate/tags/2.8.5/src/ajax/SaveController.php#L52
https://plugins.trac.wordpress.org/changeset?reponame=&old=3631056%40loco-translate&new=3631056%40loco-translate
https://www.wordfence.com/threat-intel/vulnerabilities/id/9571a2f3-d148-4e9b-8837-b8d212418613?source=cve

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