john-dagelmore GPTranslate Plugin up to 2.31 on WordPress Deterministically Derived API Key request gptApiKey cross site scripting

Summaryinfo

A vulnerability has been found in john-dagelmore GPTranslate Plugin up to 2.31 on WordPress and classified as problematic. Affected by this vulnerability is an unknown functionality of the file /wp-json/gptranslate/v1/request of the component Deterministically Derived API Key Handler. Performing a manipulation of the argument gptApiKey results in cross site scripting. This vulnerability is identified as CVE-2026-9109. The attack can be initiated remotely. There is not any exploit available. The affected component should be upgraded.

Detailsinfo

A vulnerability, which was classified as problematic, was found in john-dagelmore GPTranslate Plugin up to 2.31 on WordPress. This affects an unknown part of the file /wp-json/gptranslate/v1/request of the component Deterministically Derived API Key Handler. The manipulation of the argument gptApiKey with an unknown input leads to a cross site scripting vulnerability. CWE is classifying the issue as 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. This is going to have an impact on integrity. The summary by CVE is:

The GPTranslate – Multilingual AI Translation for WordPress: Automatically Translate Websites plugin for WordPress is vulnerable to Stored Cross-Site Scripting via REST API Translation Storage in all versions up to, and including, 2.31 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. The deterministically derived API key (sha256 of the site URL) is printed in the HTML source of every page via the JavaScript variable gptApiKey, meaning any unauthenticated visitor can retrieve the key and submit malicious translation payloads to the /wp-json/gptranslate/v1/request endpoint without any additional precondition.

The weakness was released by Hardeep and Chris. The advisory is shared at wordfence.com. This vulnerability is uniquely identified as CVE-2026-9109 since 05/20/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. It demands that the victim is doing some kind of user interaction. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1059.007 for this issue.

Upgrading to version 2.27.5 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-36642). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Type

• WordPress Plugin

Vendor

• john-dagelmore

Name

• GPTranslate Plugin

Version

• 2.0
• 2.1
• 2.2
• 2.3
• 2.4
• 2.5
• 2.6
• 2.7
• 2.8
• 2.9
• 2.10
• 2.11
• 2.12
• 2.13
• 2.14
• 2.15
• 2.16
• 2.17
• 2.18
• 2.19
• 2.20
• 2.21
• 2.22
• 2.23
• 2.24
• 2.25
• 2.26
• 2.27
• 2.28
• 2.29
• 2.30
• 2.31

CPE 2.3info

• 🔒
• 🔒
• 🔒

CPE 2.2info

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• 🔒

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Entryinfo

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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