High severity · published Oct 11, 2026
CVE-2026-91829
Subscribe to Comments < 2.3.3 - Reflected XSS via 'ref' Parameter
7.1
CVSS
0.2%
EPSS
No
On KEV
Description
The Subscribe to Comments WordPress plugin before 2.3.3 does not properly validate a parameter before reflecting it into a link target, allowing unauthenticated attackers to perform Reflected Cross-Site Scripting via a crafted URL against anyone who clicks it, including administrators.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
Low
Integrity
Low
Availability
Low
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 6% 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-2026-91829
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-91829
exploit
https://wpscan.com/vulnerability/1ed0314d-9871-4914-bb9c-ff894ea4c400/
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6.5
CVE-2026-91830
Subscribe to Comments < 2.3.3 - Unauthenticated Subscription Management Key Disclosure via Forged Comment Cookie
3.8
CVE-2026-91831
Subscribe to Comments 2.3 - 2.3.2 - Author+ Email Header Injection via From Name Setting