TI-2024-01572 Aliases CVE-2024-1691 GHSA-xh6j-v8vp-q869

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

LOW 28CWE-79Published 2024-03-13 · Updated 2026-04-08

Key facts

Attack vector: Network
Privileges required: None
User interaction: Required
Attack complexity: Low
Impact type: Cross-site scripting
Confidentiality · integrity · availability: Low · Low · None
Fix status: No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-79.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00466 40th percentileScored 2026-11-07

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Themisle	Otter Blocks PRO – Gutenberg Blocks, Page Builder for Gutenberg Editor & FSE	up to 2.6.3	—	No fix listed	CNA

Otter Blocks PRO – Gutenberg Blocks, Page Builder for Gutenberg Editor & FSE VendorThemisle Affected up to 2.6.3 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:themeisle:otter_blocks::::::wordpress::*	before 2.6.4	Vulnerable	themeisle

cpe:2.3:a:themeisle:otter_blocks:*:*:*:*:*:wordpress:*:* Versions before 2.6.4 Vulnerable ·themeisle

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2024-1691
2026-10-03 Alias added: GHSA-xh6j-v8vp-q869

References

Advisory 1

https://www.wordfence.com/threat-intel/vulnerabilities/id/77838bf8-7809-4dd6-87f1-a9bda40275a6?source=cve

Other 1

https://store.themeisle.com/?edd_action=view_changelog&name=Otter%20Pro

TI-2024-10393 Path traversal in themeisle Otter Blocks – Gutenberg Blocks, Page Builder for Gutenberg… CVSS 3.1HIGH 7.5
TI-2024-03471 Cross-site scripting in themeisle Otter Blocks – Gutenberg Blocks, Page Builder for… CVSS 3.1MEDIUM 6.4
TI-2024-01565 Otter Blocks PRO <= 2.6.3 - Authenticated(Contributor+) Stored Cross-Site Scripting via File Field CSS CVSS 3.1MEDIUM 6.4
TI-2024-03128 Unrestricted file upload in themeisle Otter Blocks – Gutenberg Blocks, Page Builder for… CVSS 3.1MEDIUM 6.4
TI-2024-03127 Cross-site scripting in themeisle Otter Blocks – Gutenberg Blocks, Page Builder for… CVSS 3.1MEDIUM 6.4
TI-2024-02651 Cross-site scripting in themeisle Otter Blocks – Gutenberg Blocks, Page Builder for… CVSS 3.1MEDIUM 6.4

See all 9 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences