Read the docs
TI-2026-70910 Aliases CVE-2026-107864GHSA-39qx-x9h5-r974

Stored cross-site scripting in WordPress Ad Inserter plugin

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

Igor Funa's Ad Inserter plugin for WordPress, through version 2.8.18, does not neutralize input during web page generation, which allows stored cross-site scripting (CWE-79). An attacker with low privileges can store script that runs in other users' browsers when a user interacts with the affected page.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

Description from the CNA

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Igor Funa Ad Inserter ad-inserter allows Stored XSS.This issue affects Ad Inserter: from n/a through 2.8.18.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00129 2nd 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
Igor FunaAd Inserterup to 2.8.18—No fix listedCNA
  • Ad Inserter VendorIgor Funa Affected up to 2.8.18 Fixed in — No fix listed CNA

Remediation

The sources list no fixed version for Ad Inserter.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

Timeline

  1. 2026-10-12 Threatist record created from CVE-2026-107864
  2. 2026-10-12 Alias added: GHSA-39qx-x9h5-r974
  3. 2026-10-12 CISA SSVC decision points changed
  4. 2026-10-12 Priority changed: MEDIUM → LOW

References

Other 1

  • TI-2023-04281 Ad Inserter <= 2.7.30 - Unauthenticated Sensitive Information Exposure via ai_ajax CVSS 3.1MEDIUM 5.3
  • TI-2026-82395 Stored cross-site scripting in WordPress Ad Inserter plugin CVSS 3.1MEDIUM 6.5
  • TI-2026-80316 Reflected cross-site scripting in WordPress Ad Inserter plugin CVSS 3.1MEDIUM 6.5
  • TI-2026-80068 Ad Inserter WordPress plugin cross-site scripting (XSS) vulnerability CVSS 3.1MEDIUM 6.5

Sources

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