Medium severity · published Oct 16, 2026
CVE-2026-91830
Subscribe to Comments < 2.3.3 - Unauthenticated Subscription Management Key Disclosure via Forged Comment Cookie
6.5
CVSS
0.2%
EPSS
No
On KEV
Description
The Subscribe to Comments WordPress plugin before 2.3.3 does not sign or validate a cookie it trusts to identify a commenter, allowing unauthenticated attackers to disclose a subscriber's management key and silently alter that subscriber's subscriptions.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 7% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
ST
Subscribe to Comments ·
before 2.3.3 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-91830
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-91830
wpscan.com
https://wpscan.com/vulnerability/b2b1638a-f8af-49f7-86a6-a3eeea0526b1/
More from Subscribe to Comments
7.1
CVE-2026-91829
Subscribe to Comments < 2.3.3 - Reflected XSS via 'ref' Parameter
3.8
CVE-2026-91831
Subscribe to Comments 2.3 - 2.3.2 - Author+ Email Header Injection via From Name Setting