CVE-2026-91092Network attack vectorHinoki check available

Guest post takeover via forged ownership cookie

Published Sep 22, 2026 · Updated Sep 22, 2026

Missing authorization in AdvancedCoding wpForo Forum 3.1.5 and earlier allows remote authenticated users to take over guest posts. The wpforo_post_edit action trusts a forged comment_author_email ownership cookie instead of verifying that the subscriber owns the guest post. Guest posting and editing must be enabled, and the attacker must know the guest author's email address; successful requests change the title, body, author name, and stored owner email.

CVSS severity4.3
Medium
EPSS probability0.39%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Missing authorization in AdvancedCoding wpForo Forum 3.1.5 and earlier allows remote authenticated users to take over guest posts. The wpforo_post_edit action trusts a forged comment_author_email ownership cookie instead of verifying that the subscriber owns the guest post. Guest posting and editing must be enabled, and the attacker must know the guest author's email address; successful requests change the title, body, author name, and stored owner email.

The record

CVE
CVE-2026-91092
Published
Sep 22, 2026
Updated
Sep 22, 2026
Vendor
AdvancedCoding
Product
wpForo Forum
Classifications
CWE-862, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 22, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 22, 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 <=3.1.5

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

AdvancedCoding · wpForo Forumversion=0 <=3.1.5

Published CVSS scores

4.3WPScanCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-862Missing Authorization
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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