CVE-2024-1691: CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in Themisle Otter Blocks PRO – Gutenberg Blocks, Page Builder for Gutenberg Editor & FSE
The Otter Blocks – Gutenberg Blocks, Page Builder for Gutenberg Editor & FSE PRO plugin for WordPress is vulnerable to Stored Cross-Site Scripting via file upload form, which allows SVG uploads, in all versions up to, and including, 2.6.3 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. Note that the patch in 2.6.4 allows SVG uploads but the uploaded SVG files are sanitized.
AI Analysis
Technical Summary
CVE-2024-1691 is a stored Cross-Site Scripting vulnerability in Themisle's Otter Blocks PRO – Gutenberg Blocks, Page Builder for Gutenberg Editor & FSE WordPress plugin. The vulnerability arises from insufficient input sanitization and output escaping in the file upload form that permits SVG file uploads. Attackers can exploit this to inject arbitrary web scripts that execute in the context of users viewing the compromised pages. The vulnerability affects all versions up to and including 2.6.3. The issue is resolved in version 2.6.4, which allows SVG uploads but sanitizes the files to prevent script injection.
Potential Impact
Successful exploitation can lead to the execution of arbitrary scripts in the browsers of users who access pages containing the injected SVG files. This can result in information disclosure and limited integrity impact. The vulnerability does not affect availability. The CVSS v3.1 base score is 6.1 (medium severity), reflecting network attack vector, low attack complexity, no privileges required, user interaction required, and partial confidentiality and integrity impact.
Mitigation Recommendations
Upgrade the Otter Blocks PRO plugin to version 2.6.4 or later, where the vulnerability is fixed by sanitizing uploaded SVG files. Users should not rely on earlier versions as they are vulnerable. No additional mitigations are specified or required once the plugin is updated.
CVE-2024-1691: CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in Themisle Otter Blocks PRO – Gutenberg Blocks, Page Builder for Gutenberg Editor & FSE
Description
The Otter Blocks – Gutenberg Blocks, Page Builder for Gutenberg Editor & FSE PRO plugin for WordPress is vulnerable to Stored Cross-Site Scripting via file upload form, which allows SVG uploads, in all versions up to, and including, 2.6.3 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. Note that the patch in 2.6.4 allows SVG uploads but the uploaded SVG files are sanitized.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2024-1691 is a stored Cross-Site Scripting vulnerability in Themisle's Otter Blocks PRO – Gutenberg Blocks, Page Builder for Gutenberg Editor & FSE WordPress plugin. The vulnerability arises from insufficient input sanitization and output escaping in the file upload form that permits SVG file uploads. Attackers can exploit this to inject arbitrary web scripts that execute in the context of users viewing the compromised pages. The vulnerability affects all versions up to and including 2.6.3. The issue is resolved in version 2.6.4, which allows SVG uploads but sanitizes the files to prevent script injection.
Potential Impact
Successful exploitation can lead to the execution of arbitrary scripts in the browsers of users who access pages containing the injected SVG files. This can result in information disclosure and limited integrity impact. The vulnerability does not affect availability. The CVSS v3.1 base score is 6.1 (medium severity), reflecting network attack vector, low attack complexity, no privileges required, user interaction required, and partial confidentiality and integrity impact.
Mitigation Recommendations
Upgrade the Otter Blocks PRO plugin to version 2.6.4 or later, where the vulnerability is fixed by sanitizing uploaded SVG files. Users should not rely on earlier versions as they are vulnerable. No additional mitigations are specified or required once the plugin is updated.
Technical Details
- Data Version
- 5.1
- Assigner Short Name
- Wordfence
- Date Reserved
- 2024-02-20T21:05:51.059Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 699f6d39b7ef31ef0b56f1c5
Added to database: 2/25/2026, 9:44:25 PM
Last enriched: 4/9/2026, 1:45:04 PM
Last updated: 4/12/2026, 5:14:42 PM
Views: 7
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