wpForo Forum <= 3.1.5 - Missing Authorization to Authenticated (Subscriber+) Guest Post Takeover via wpforo_post_edit Action / Forged comment_author_email Cookie
Published Sep 22, 2026
4.3
MEDIUMCVSS 3.1
EPSS 0.39%
Description
The 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.
Affected products
-
- Version 0StatusaffectedConstraints<=3.1.5
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Tomdever | wpForo Forum | unaffected |
|
No data.
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
No CVSS v3.0 score for this CVE.
No CVSS v2.0 score for this CVE.
This CVE is not in the KEV list.
CISA SSVC (Vulnrichment)
Stakeholder-Specific Vulnerability Categorization from CISA ADP.
Exploitation
NoneAutomatable
NoTechnical Impact
PartialDecision
n/aAssessed Sep 23, 2026 · SSVC 2.0.3
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 4, 2026.
Score over time
Sep-Oct 2026- EPSS v5
Percentile over time
- EPSS v5
Table of values (2 key points)
Flat stretches are collapsed. Showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 4, 2026 | 0.39% (0.00394) | 31.25th | v5 (v2026.06.15) |
| Sep 22, 2026 | 0.24% (0.00240) | 15.36th | v5 (v2026.06.15) |
References (7)
- https://plugins.trac.wordpress.org/browser/wpforo/tags/3.1.5/classes/Actions.php#L806
- https://plugins.trac.wordpress.org/browser/wpforo/tags/3.1.5/classes/Members.php#L3704
- https://plugins.trac.wordpress.org/browser/wpforo/tags/3.1.5/classes/Posts.php#L319
- https://plugins.trac.wordpress.org/browser/wpforo/tags/3.1.5/includes/functions.php#L2820
- https://plugins.trac.wordpress.org/browser/wpforo/tags/3.1.5/includes/hooks.php#L1004
- https://plugins.trac.wordpress.org/changeset?reponame=&old=3702319%40wpforo&new=3702319%40wpforo
- https://www.wordfence.com/threat-intel/vulnerabilities/id/97084759-a8fb-4b26-a6fa-93d005b1110e?source=cve
Change history (0)
No recorded changes yet.