CVE-2026-86823

Newsletter < 9.3.7 - Unauthenticated Open Redirect and Subscriber Token Disclosure via ncu Parameter

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.

Affected

Newsletter

CVSS v3.1 CNA

5.3 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

EPSS

0.32% chance of exploitation in the next 30 days, 24th percentile

Published

2026-09-16

Updated

2026-09-17

Proof-of-concept exploits (1)

• https://wpscan.com/vulnerability/2db98679-24ca-494e-a8fd-f6417a0f1ea8/

References

• CVE Record
• NVD entry