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TI-2026-86156 Aliases CVE-2026-120845GHSA-f738-cw88-chq3

Stored XSS in WPMU DEV Smush Image Compression and Optimization

Priority LOW 28CWE-79Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
Required
Attack complexity
Low
Impact type
Cross-site scripting
Confidentiality · integrity · availability
Low · Low · Low
Fix status
No fix listed

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

Summary

WPMU DEV Smush Image Compression and Optimization plugin versions through 4.3.5 contain a stored cross-site scripting flaw (CWE-79). Input is not neutralized when web pages are generated, so attacker-supplied script is stored and returned to other users. An attacker with low privileges needs a user to interact with the affected page for the script to run.

Written with Claude Haiku 5.5 from the sources below · 2026-11-07

Description from the CNA

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.0017 6th 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

VendorProductAffected versionsFixed inStatusSource
wpmudevSmush Image Compression and Optimizationup to 4.3.5—No fix listedCNA
  • Smush Image Compression and Optimization Vendorwpmudev Affected up to 4.3.5 Fixed in — No fix listed CNA

Remediation

The sources list no fixed version for Smush Image Compression and Optimization.

Written with Claude Haiku 5.5 from the sources below · 2026-11-07

Timeline

  1. 2026-11-06 Threatist record created from CVE-2026-120845
  2. 2026-11-07 Alias added: GHSA-f738-cw88-chq3
  3. 2026-11-07 CISA SSVC decision points changed
  4. 2026-11-07 Priority changed: MEDIUM → LOW

References

Other 1

  • TI-2023-04240 Forminator <= 1.24.6 - Unauthenticated Arbitrary File Upload CVSS 3.1CRITICAL 9.8
  • TI-2023-04683 Defender Security < 4.1.0 - Protection Bypass (Hidden Login Page) CVSS 3.1MEDIUM 5.3
  • TI-2026-13248 Forminator Forms <= 1.56.1 - Unauthenticated Arbitrary File Upload via Forged Upload Field Configuration CVSS 3.1CRITICAL 9.8
  • TI-2025-05864 Forminator Forms – Contact Form, Payment Form & Custom Form Builder <= 1.44.2… CVSS 3.1HIGH 8.8
  • TI-2024-20466 SQL injection in wpmudev Forminator CVSS 3.1HIGH 7.2
  • TI-2024-07873 Hustle < 7.8.5 - Admin+ Stored XSS CVSS 3.1MEDIUM 4.8
See all 120 →

Sources

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