CVE-2026-28554

wpForo Forum 2.4.14 Missing Authorization via Post Approval AJAX Handler

5.3MediumCVSS base score
0.30%Exploitation in 30 daysEPSS · top 76% of all CVEs
NoKnown exploitednot in CISA's KEV catalog
NonePublic exploitsnone known yet

Description

wpForo Forum 2.4.14 contains a missing authorization vulnerability that allows authenticated subscribers to approve or unapprove any forum post via the wpforo_approve_ajax AJAX handler. Attackers exploit the nonce-only check by submitting a valid nonce with an arbitrary post ID to bypass moderation controls entirely.

Timeline

2026
28 Feb 2026
28 Feb 2026
ID reserved
By VulnCheck
28 Feb 2026
28 Feb 2026
Published
11 May 20262 months later
11 May 2026· 2 months later
Record updated

Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.

Scores

CVSS scores of CVE-2026-28554, by who scored it
Scored by	CVSS	Score	Vector
VulnCheckCNA (assigner)	4.0	Medium5.3	CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
VulnCheckCNA (assigner)	3.1	Medium4.3	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
NVDNVD · Analyzed	4.0	Medium5.3	CVSS:4.0/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

EPSS (exploitation in 30 days): 0.30% · top 76% of all CVEs (11 Nov 2026)
CISA SSVC: Exploitation: none · Automatable: no · Technical impact: partial

The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.3.

Affected products

gVectors Team · wpForo Forum
- affected 2.4 – < 2.4.16
- unaffected 2.4.16

References3

Sources

The same CVE in the primary databases and aggregators, to check against.

Badge for a README or a ticket

[![CVE-2026-28554](https://cveledger.app/badge/CVE-2026-28554.svg)](https://cveledger.app/cve/CVE-2026-28554)

Record last updated 11 May 2026, 23:11 UTC.