Medium severity · published Sep 16, 2026
CVE-2026-86823
Newsletter < 9.3.7 - Unauthenticated Open Redirect and Subscriber Token Disclosure via ncu Parameter
5.3
CVSS
0.3%
EPSS
No
On KEV
Description
The Newsletter WordPress plugin before 9.3.7 does not validate the destination of the redirect performed after a public subscription action, allowing unauthenticated attackers to redirect users to arbitrary external sites and to disclose a subscriber token that grants access to that subscriber record's front-end actions.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
Low
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 25% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
NE
Newsletter ·
before 9.3.7 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-86823
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-86823
wpscan.com
https://wpscan.com/vulnerability/2db98679-24ca-494e-a8fd-f6417a0f1ea8/
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