HOMEVULNERABILITIESCVE-2026-28557
MEDIUM

CVE-2026-28557

CWE-862Published: February 28, 2026· Updated: Mar 4, 2026

6.5
CVSS v3.1
EPSS:0.03%probability of exploitation in 30 daysPercentile:6.5th

Official 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.

NVD Source

Technical Analysis

CVE-2026-28557 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in full integrity compromise (data manipulation), with a CVSS base score of 6.5.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.Low
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityHigh
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

Affected Vendors & Products

gvectors1 product
wpforo forum
Source: NVD CPE · 1 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

ADVISORYhttps://www.vulncheck.com/advisories/wpforo-forum-privilege-escalation-via-role-synchronization-handler

All References (3)

→
https://wordpress.org/plugins/wpforo/Product
→
https://wordpress.org/plugins/wpforo/#developersRelease Notes
→
https://www.vulncheck.com/advisories/wpforo-forum-privilege-escalation-via-role-synchronization-handlerThird Party Advisory

Quick Facts

CVE IDCVE-2026-28557
CVSS Score6.5 / 10
SeverityMEDIUM
WeaknessCWE-862
CISA KEVNo
EPSS (30d)0.03%
Affected1 vendor
PublishedFeb 28, 2026

Related CVEs (CWE-862)

CVE-2025-30416
10.0
CVE-2026-0092
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CVE-2026-2031
10.0
CVE-2026-34976
10.0
CVE-2026-33712
10.0
CVE-2026-44442
9.9

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2026-28557 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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