wpForo Forum <= 3.1.5 - Missing Authorization to Authenticated (Subscriber+) Guest Post Takeover via wpforo_post_edit Action / Forged comment_author_email Cookie

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-91092
StatePUBLISHED
AssignerWordfence
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-22 08:16:41 UTC
Updated2026-09-22 08:16:41 UTC
DescriptionThe wpForo Forum plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 3.1.5. This is due to the plugin not properly verifying that a user is authorized to perform an action. This makes it possible for authenticated attackers, with subscriber-level access and above, to take over another guest author's forum post and modify its title, body, author name, and stored owner email address. This requires that guest posting and editing are enabled on the forum, and that the attacker knows the target guest author's email address.

Risk And Classification

Primary CVSS: v3.1 4.3 MEDIUM from [email protected]

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

Problem Types: CWE-862 | CWE-862 CWE-862 Missing Authorization

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary4.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
3.1CNADECLARED4.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
None

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Tomdever WpForo Forum affected 3.1.5 semver Not specified

References

ReferenceSourceLinkTags
plugins.trac.wordpress.org/browser/wpforo/tags/3.1.5/classes/Actions.php [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/wpforo/tags/3.1.5/includes/hooks.php [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/changeset [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/wpforo/tags/3.1.5/includes/functions.php [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/wpforo/tags/3.1.5/classes/Members.php [email protected] plugins.trac.wordpress.org
www.wordfence.com/threat-intel/vulnerabilities/id/97084759-a8fb-4b26-a6fa-93d00... [email protected] www.wordfence.com
plugins.trac.wordpress.org/browser/wpforo/tags/3.1.5/classes/Posts.php [email protected] plugins.trac.wordpress.org
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: Jonah Burgess (CryptoCat) (en)

Additional Advisory Data

SourceTimeEvent
CNA2026-09-14T18:24:03.000ZVendor Notified
CNA2026-09-21T19:01:21.000ZDisclosed

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