Ad Inserter 2.8.12 - 2.8.18 - Subscriber+ RCE / Stored XSS via Global Custom Fields
Priority LOW 34CWE-94Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- High
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-94.
Summary
The Ad Inserter WordPress plugin before 2.8.19 does not correctly restrict access to one of its settings pages, making it reachable by every logged in user under a configuration its own settings allow, and does not filter the content saved there, allowing users with a role as low as subscriber to store code which is then executed as PHP or served unescaped to site visitors.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00253 16th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA
Fix Fixed Ad Inserter (Unknown): 2.8.19
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Unknown | Ad Inserter | 2.8.12 to before 2.8.19 | 2.8.19 | Patch available | CNA |
- Ad Inserter VendorUnknown Affected 2.8.12 to before 2.8.19 Fixed in 2.8.19 Patch available CNA
Remediation
- Fix · CNA Ad Inserter (Unknown) Fixed in 2.8.19
Timeline
- 2026-10-02 Threatist record created from CVE-2026-81655
- 2026-10-03 Alias added: GHSA-8f3r-fqj2-gfj6
References
Sources
- CVE-2026-81655 · CVE Program
- CVE-2026-81655 · NVD
- FIRST EPSS
- GHSA-8f3r-fqj2-gfj6 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences