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CVE-2024-1691

Otter Blocks PRO <= 2.6.3 - Unauthenticated Stored Cross-Site Scripting via SVG Upload

MEDIUM
6.1
CVSS Score
Published: March 13, 2024 at 03:26 PM UTC
Updated: June 17, 2026 at 07:04 AM UTC
2 products affected across 2 vendorsOtter BlocksOtter Blocks

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Severity
MEDIUM6.1
Exploit prediction
EPSS 0.5%
SSVC
No known exploit

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Otter Blocks· Themeislewordpress-plugin
95%
v < 2.6.4
Affected range stops below 2.6.4, so it looks safe — our inference, not a vendor statement
Otter Blocks· Themislewordpress-plugin
60%
v ≤ 2.6.3

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (2)

Release Notes
Source: [email protected]
https://store.themeisle.com/?edd_action=view_changelog&name=Otter%20Pro
Third Party Advisory
Source: [email protected]
https://www.wordfence.com/threat-intel/vulnerabilities/id/77838bf8-7809-4dd6-87f1-a9bda40275a6?source=cve

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

6.1MEDIUMWordfence
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-79

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