Unknown Newsletter vulnerabilities

2 CVEs affecting Unknown Newsletter, 0 known to be exploited (CISA KEV), with EPSS scores. Latest: CVE-2026-86824, published 2026-09-17.

More from Unknown.

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Known exploited (CISA KEV) first, then by EPSS exploit probability.

• CVE-2026-86823, published 2026-09-16. Medium severity, CVSS 5.3. EPSS: 0.3% chance of exploitation in the next 30 days. 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…
• CVE-2026-86824, published 2026-09-17. Medium severity, CVSS 4.8. EPSS: 0.2% chance of exploitation in the next 30 days. The Newsletter WordPress plugin before 9.3.8 does not generate its email tracking signing key with sufficient entropy and signs its tracking links with an unkeyed hash, allowing an unauthenticated…