Newsletter < 9.3.8 - Unauthenticated Subscriber PII Disclosure and Modification via Predictable Tracking Signature Key

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-86824
StatePUBLISHED
AssignerWPScan
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-17 06:16:51 UTC
Updated2026-09-17 06:16:51 UTC
DescriptionThe 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 attacker who recovers that key offline to forge tracking links, obtain any subscriber's session token, and read and modify that subscriber's stored personal data.

Risk And Classification

Problem Types: CWE-326 Inadequate Encryption Strength

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Unknown Newsletter affected 9.3.8 semver Not specified

References

ReferenceSourceLinkTags
wpscan.com/vulnerability/62ee25d9-ec38-402c-9959-37fd89708aca [email protected] wpscan.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: Karthik Ramakrishnan (en)

CNA: WPScan (en)

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