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Stored cross-site scripting in WordPress ACF Extended plugin

Priority LOW 30CWE-79Published · Updated

Key facts

Attack vector
Network
Privileges required
None
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

The ACF Extended plugin for WordPress, through version 0.9.2.7, does not properly neutralize input when it generates web pages, which is classified as CWE-79. A remote attacker without privileges can store script that runs in a victim's browser when a user interacts with the affected page.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Description from the CNA

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in ACF Extended ACF Extended acf-extended allows Stored XSS.This issue affects ACF Extended: from n/a through 0.9.2.7.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.0019 8th 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
ACF ExtendedACF Extendedup to 0.9.2.7—No fix listedCNA
  • ACF Extended VendorACF Extended Affected up to 0.9.2.7 Fixed in — No fix listed CNA

Remediation

The sources list no fixed version for ACF Extended.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Timeline

  1. 2026-10-22 Threatist record created from CVE-2026-112313
  2. 2026-10-22 Alias added: GHSA-x538-c3wf-pxfr

References

  • TI-2026-84138 Code injection in Advanced Custom Fields: Extended PRO CVSS 3.1CRITICAL 9.8
  • TI-2026-79236 Missing authorization in WordPress ACF Extended plugin CVSS 3.1HIGH 7.5
  • TI-2026-79235 Path traversal in WordPress ACF Extended lets attackers delete files CVSS 3.1MEDIUM 6.5
  • TI-2021-07147 Advanced Custom Fields: Extended < 0.8.8.7 - Admin+ SQL Injection CVSS 3.1HIGH 7.2
  • TI-2026-56123 WordPress ACF Extended plugin <= 0.9.2.6 - Broken Access Control vulnerability CVSS 3.1MEDIUM 4.3

Sources