Is CVE-2026-28557 actively exploited?

CVE-2026-28557 has no public evidence of in-the-wild exploitation as of 2026-03-02.

What is the CVSS score for CVE-2026-28557?

CVE-2026-28557 has a CVSS score of 7.1 (HIGH severity). Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/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.

How do I patch CVE-2026-28557?

Vendor patch guidance is linked from the references on this page. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2026-28557.

Which products are affected by CVE-2026-28557?

Affected products for CVE-2026-28557 are listed on this page once vendor data becomes available.

Fix CVE-2026-28557 - HIGH Vulnerability

Description

wpForo Forum 2.4.14 contains a missing capability check vulnerability that allows authenticated users to trigger bulk wpForo usergroup reassignment via the wpforo_synch_roles AJAX handler. Attackers access the usergroups admin page, accessible to any authenticated user, to obtain a nonce, then remap all wpForo usergroups to arbitrary WordPress roles.

CVSS Metrics

Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/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
Attack Vector: network
Complexity: low
Privileges: low
User Action: none
Confidentiality: undefined
Integrity: undefined
Availability: undefined
Weaknesses: CWE-862 · Missing Authorization

Metadata

Primary Vendor: UNKNOWN
Published: 2/28/2026
Last Modified: 3/2/2026
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

CVE-2026-28557

Description

CVSS Metrics

Metadata

Affected Products

Remediation Guidance

Executive Summary