CVE-2026-91830Network attack vector

Management-key disclosure via forged commenter cookie

Published Oct 16, 2026 · Updated Oct 16, 2026

Key disclosure in Subscribe to Comments before 2.3.3 allows remote attackers to alter subscriptions via a forged cookie. The plugin trusts an unsigned, unvalidated commenter-identification cookie and reveals the associated subscriber's management key. No authentication is required, and the disclosed key authorizes silent changes to that subscriber's subscriptions.

CVSS severityUnavailable
Unscored
EPSS probability0.18%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Key disclosure in Subscribe to Comments before 2.3.3 allows remote attackers to alter subscriptions via a forged cookie. The plugin trusts an unsigned, unvalidated commenter-identification cookie and reveals the associated subscriber's management key. No authentication is required, and the disclosed key authorizes silent changes to that subscriber's subscriptions.

The record

CVE
CVE-2026-91830
Published
Oct 16, 2026
Updated
Oct 16, 2026
Vendor
Mark Jaquith
Product
Subscribe to Comments
Classifications
CWE-200, T1565.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 16, 2026CVE publishedPublication date reported by the CVE source.
  2. Oct 16, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <2.3.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Mark Jaquith · Subscribe to Commentsversion=0 <2.3.3

Published CVSS scores

No CVSS assessment is available in this record.

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Activity data is delayed. The latest report is Sep 28, 2026.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-200Information Exposure
T1565.001Stored Data Manipulation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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