CVE-2026-120845 PUBLISHED

WordPress Smush Image Compression and Optimization plugin <= 4.3.5 - Cross Site Scripting (XSS) vulnerability

Assigner: Patchstack
Reserved: 03.11.2026 Published: 06.11.2026 Updated: 06.11.2026

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in WPMU DEV Smush Image Compression and Optimization wp-smushit allows Stored XSS.This issue affects Smush Image Compression and Optimization: from n/a through 4.3.5.

Metrics

CVSS 3.1

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L
CVSS Score: 6.5

Attack Vector	Network	Scope	Changed
Attack Complexity	Low	Confidentiality Impact	Low
Privileges Required	Low	Integrity Impact	Low
User Interaction	Required	Availability Impact	Low

CVSS 3.1

Product Status

Vendor	WPMU DEV
Product	Smush Image Compression and Optimization
Versions	Default: unaffected affected from 0 to 4.3.5 (incl.)

Solutions

Update the WordPress Smush Image Compression and Optimization plugin to the latest available version (at least 4.3.6).

Credits

dzaku | Patchstack Bug Bounty Program finder

References

https://patchstack.com/database/wordpress/plugin/wp-smushit/vulnerability/wordpress-smush-image-compression-and-optimization-plugin-4-3-5-cross-site-scripting-xss-vulnerability?_s_id=cve

Problem Types

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') CWE

Impacts

Stored XSS