smub Envira Gallery Plugin up to 1.12.4 on WordPress REST API update_gallery_data arrows cross site scripting

Summaryinfo

A vulnerability, which was classified as problematic, has been found in smub Envira Gallery Plugin up to 1.12.4 on WordPress. This affects the function update_gallery_data of the component REST API. This manipulation of the argument arrows causes cross site scripting. This vulnerability is registered as CVE-2026-5361. Remote exploitation of the attack is possible. No exploit is available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in smub Envira Gallery Plugin up to 1.12.4 on WordPress. It has been declared as problematic. Affected by this vulnerability is the function update_gallery_data of the component REST API. The manipulation of the argument arrows with an unknown input leads to a cross site scripting vulnerability. The CWE definition for the vulnerability is 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. As an impact it is known to affect integrity. The summary by CVE is:

The Envira Gallery Lite plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the REST API in versions up to and including 1.12.4. This is due to insufficient input sanitization in the update_gallery_data() function and improper output escaping in the gallery_init() function. The sanitize_config_values() function only sanitizes the justified_gallery_theme and justified_row_height parameters, but does not sanitize the arrows parameter. When the arrows value is output in the inline JavaScript configuration, it uses esc_attr() which is designed for HTML attribute contexts, not JavaScript contexts, allowing JavaScript expression injection. This makes it possible for authenticated attackers, with Author-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

The weakness was published by Athiwat Tiprasaharn and Itthidej Aramsri. The advisory is shared at wordfence.com. This vulnerability is known as CVE-2026-5361 since 04/01/2026. The exploitation appears to be easy. The attack can be launched remotely. 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 1.12.4 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at CNNVD (CNNVD-202605-3608). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Type

• Photo Gallery Software

Vendor

• smub

Name

• Envira Gallery Plugin

Version

• 1.12.0
• 1.12.1
• 1.12.2
• 1.12.3
• 1.12.4

CPE 2.3info

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CPE 2.2info

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

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