Missing authorization in Email Subscribers & Newsletters
Priority LOW 30CWE-862Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- None · Low · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-862.
Summary
The Email Subscribers & Newsletters WordPress plugin before 5.9.35 does not verify the per-subscriber management token before changing a subscriber's subscription status, allowing unauthenticated users to force-unsubscribe or force-confirm an arbitrary subscriber whose email address they know.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00304 23rd percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA
Fix Fixed Email Subscribers & Newsletters (Unknown): 5.9.35
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- 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 | Email Subscribers & Newsletters | before 5.9.35 | 5.9.35 | Patch available | CNA |
- Email Subscribers & Newsletters VendorUnknown Affected before 5.9.35 Fixed in 5.9.35 Patch available CNA
Remediation
- Fix · CNA Email Subscribers & Newsletters (Unknown) Fixed in 5.9.35
Timeline
- 2026-10-02 Threatist record created from CVE-2026-83555
- 2026-10-03 Alias added: GHSA-52g9-h9fh-xgf2
References
Sources
- CVE-2026-83555 · CVE Program
- CVE-2026-83555 · NVD
- FIRST EPSS
- GHSA-52g9-h9fh-xgf2 · 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