Themeco Cornerstone < 7.8.9 (Premium, bundled with X Theme) - Subscriber+ Arbitrary User Meta Disclosure
Priority HIGH 67Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- High · None · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA.
Summary
The Cornerstone WordPress plugin before 7.8.9 does not enforce capability checks on one of its REST API routes, allowing any authenticated user to disclose the metadata of any other user, including roles, session token previews and stored billing/shipping fields. This affects the premium co Cornerstone page builder distributed bundled with the X , not the unrelated free `cornerstone` Cornerstone WordPress plugin before 7.8.9 (v0.8.x) on the .org repository.
Why it matters now
Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00371 31st percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA
Fix Fixed Cornerstone (Unknown): 7.8.9
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- 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
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Unknown | Cornerstone | 3.0.0 to before 7.8.9 | 7.8.9 | Patch available | CNA |
- Cornerstone VendorUnknown Affected 3.0.0 to before 7.8.9 Fixed in 7.8.9 Patch available CNA
Remediation
- Fix · CNA Cornerstone (Unknown) Fixed in 7.8.9
Timeline
- 2026-10-02 Threatist record created from CVE-2026-9709
- 2026-10-03 Alias added: GHSA-c9vf-p6xc-gxq6
References
Sources
- CVE-2026-9709 · CVE Program
- CVE-2026-9709 · NVD
- FIRST EPSS
- GHSA-c9vf-p6xc-gxq6 · 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