CVE-2026-28555
wpForo Forum 2.4.14 Missing Authorization via Topic Close AJAX Handler
Description
wpForo Forum 2.4.14 contains a missing authorization vulnerability that allows authenticated subscribers to close or reopen any forum topic via the wpforo_close_ajax handler. Attackers submit a valid nonce with an arbitrary topic ID to bypass the moderator permission requirement and disrupt forum discussions.
INFO
Published Date :
Feb. 28, 2026, 10:16 p.m.
Last Modified :
March 4, 2026, 3 a.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | 83251b91-4cc7-4094-a5c7-464a1b83ea10 | ||||
| CVSS 3.1 | MEDIUM | [email protected] | ||||
| CVSS 3.1 | MEDIUM | MITRE-CVE | ||||
| CVSS 4.0 | MEDIUM | 83251b91-4cc7-4094-a5c7-464a1b83ea10 | ||||
| CVSS 4.0 | MEDIUM | [email protected] |
Solution
- Update wpForo Forum to the latest version.
- Verify that non-moderators cannot close/reopen topics.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-28555.
| URL | Resource |
|---|---|
| https://wordpress.org/plugins/wpforo/ | Product |
| https://wordpress.org/plugins/wpforo/#developers | Release Notes |
| https://www.vulncheck.com/advisories/wpforo-forum-missing-authorization-via-topic-close-ajax-handler | Third Party Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-28555 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-28555
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-28555 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-28555 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Mar. 04, 2026
Action Type Old Value New Value Added CPE Configuration OR *cpe:2.3:a:gvectors:wpforo_forum:*:*:*:*:*:wordpress:*:* versions from (including) 2.4.0 up to (excluding) 2.4.16 Added Reference Type VulnCheck: https://wordpress.org/plugins/wpforo/ Types: Product Added Reference Type VulnCheck: https://wordpress.org/plugins/wpforo/#developers Types: Release Notes Added Reference Type VulnCheck: https://www.vulncheck.com/advisories/wpforo-forum-missing-authorization-via-topic-close-ajax-handler Types: Third Party Advisory -
New CVE Received by [email protected]
Feb. 28, 2026
Action Type Old Value New Value Added Description wpForo Forum 2.4.14 contains a missing authorization vulnerability that allows authenticated subscribers to close or reopen any forum topic via the wpforo_close_ajax handler. Attackers submit a valid nonce with an arbitrary topic ID to bypass the moderator permission requirement and disrupt forum discussions. Added CVSS V4.0 AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Added CVSS V3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N Added CWE CWE-862 Added Reference https://wordpress.org/plugins/wpforo/ Added Reference https://wordpress.org/plugins/wpforo/#developers Added Reference https://www.vulncheck.com/advisories/wpforo-forum-missing-authorization-via-topic-close-ajax-handler