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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

The Ad Inserter plugin for WordPress by Igor Funa, in versions through 2.8.18, does not neutralize input during web page generation, which allows stored cross-site scripting (CWE-79). A low-privileged attacker can store script that runs in another user's browser when that user views the affected page. The attack requires that user to interact with the 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 0.0017 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
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. 2026-10-29 Threatist record created from CVE-2026-118094
  2. 2026-10-29 CISA SSVC decision points changed
  3. 2026-10-29 Priority changed: MEDIUM → LOW
  4. 2026-10-29 Alias added: GHSA-v9h6-2x94-f75q

References

  • TI-2023-04281 Ad Inserter <= 2.7.30 - Unauthenticated Sensitive Information Exposure via ai_ajax CVSS 3.1MEDIUM 5.3
  • 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
  • TI-2026-70910 Stored cross-site scripting in WordPress Ad Inserter plugin CVSS 3.1MEDIUM 6.5

Sources