What’s Vulnerable › Vulnerabilities

CVE-2024-1691: Otter Blocks PRO <= 2.6.3 - Unauthenticated Stored Cross-Site Scripting via SVG Upload

• Severity: medium (CVSS 6.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-03-13 · updated 2026-06-17
• Weakness: CWE-79

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.

Affected products

• themeisle Otter Blocks – Gutenberg Blocks, Page Builder for Gutenberg Editor & FSE: before 2.6.4 — fixed in 2.6.4

How to fix

Upgrade to a fixed version: themeisle Otter Blocks – Gutenberg Blocks, Page Builder for Gutenberg Editor & FSE 2.6.4. Check the vendor advisory for mitigations.

References

• https://store.themeisle.com/?edd_action=view_changelog&name=Otter%20Pro
• https://www.wordfence.com/threat-intel/vulnerabilities/id/77838bf8-7809-4dd6-87f1-a9bda40275a6?source=cve
• https://store.themeisle.com/?edd_action=view_changelog&name=Otter%20Pro
• https://www.wordfence.com/threat-intel/vulnerabilities/id/77838bf8-7809-4dd6-87f1-a9bda40275a6?source=cve

Get alerted when CVE-2024-1691 or the next vulnerability affects your stack