Reference page — cumulative record through Sunday, October 4, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.
CVE-2026-86823
Unknown Newsletter — Newsletter < 9.3.7 - Unauthenticated Open Redirect and Subscriber Token Disclosure via ncu Parameter
AV AC PR UI S C I A CVSS EPSS %ile KEV
N L N N U L N N 5.3 .0032 23.1 —
AFFECTED
Product Versions Fixed
Newsletter unspecified —
TIMELINE
Sep 8 Reserved by WPScan
Sep 16 Published (CNA: WPScan)
Sep 17 EXPLOIT PUBLISHED — CVE-2026-86823 (Unknown Newsletter). Public exploit reference added.
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.
Lifecycle
Complete event history — 3 events, chronological
| Date | Event | Detail |
|---|
| September 8, 2026 | Reserved | Reserved by WPScan |
| September 16, 2026 | Published | Published (CNA: WPScan) |
| September 17, 2026 | EXPLOIT PUBLISHED | EXPLOIT PUBLISHED — CVE-2026-86823 (Unknown Newsletter). Public exploit reference added. |
Affected
Affected products and packages — 1 row
| Vendor | Product / Package | Ecosystem | Version introduced | Fixed |
|---|
| Unknown | Newsletter | — | — | — |
About this page
This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-86823 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Sunday, October 4, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.
