CVE-2026-18510
Received Received - Intake

Stored XSS in TranslatePress WordPress Plugin via Comment Content

Publication date: 2026-08-06

Last updated on: 2026-08-06

Assigner: Wordfence

Description
The TranslatePress – Translate Multilingual sites with AI Translation plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Comment Content (URL-encoded gettext markers) in all versions up to, and including, 3.2.6 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. Comment moderation may delay exploitation for first-time commenters, but does not prevent it, as the payload uses only WordPress-permitted tags and attributes with percent-encoded characters that pass wp_kses URL validation unmodified.

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Meta Information

Published
2026-08-06
Last Modified
2026-08-06
Generated
2026-08-06
AI Q&A
2026-08-06
EPSS Evaluated
N/A
NVD
CVE-2026-18510
EUVD
EUVD-2026-53715

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
translatepress translate_multilingual_sites_with_ai_translation to 3.2.6 (inc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-79 The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.

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Executive Summary

This is a Stored Cross-Site Scripting (XSS) vulnerability in the TranslatePress WordPress plugin up to version 3.2.6. It allows unauthenticated attackers to inject malicious scripts via comment content using URL-encoded gettext markers. The issue arises from insufficient input sanitization and output escaping, enabling script execution when users view infected pages.

Detection Guidance

Check WordPress sites using TranslatePress plugin versions up to 3.2.6 for stored XSS via comment content with URL-encoded gettext markers. Inspect comments for suspicious scripts or encoded payloads.

Impact Analysis

An attacker could steal user sessions, redirect to malicious sites, or perform actions on behalf of users. Even first-time commenters can exploit it as the payload bypasses WordPress's wp_kses validation using percent-encoded characters. Comment moderation only delays but does not prevent exploitation.

Compliance Impact

This vulnerability could lead to unauthorized data access or modification, violating GDPR's integrity and confidentiality requirements. For HIPAA, it may expose protected health information, risking compliance with security and privacy rules. Organizations must address it to maintain regulatory adherence.

Mitigation Strategies

Update TranslatePress plugin to the latest version beyond 3.2.6. Review and remove suspicious comments. Enable strict input validation for comments and enforce output escaping.

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