CVE-2026-12687

ProfileGrid – User Profiles, Groups and Communities < 5.9.9.8 - Unauthenticated Group Registration Bypass

2026-07-10 00:00

Strategic Overview

Status: Patched in 5.9.9.8
Affected Plugin: ProfileGrid – User Profiles, Groups and Communities
Affected Version: < 5.9.9.8
CVSS: 6.5Medium
Weakness type: CWE-20 · Improper Input Validation
CVE: CVE-2026-12687

View all ProfileGrid – User Profiles, Groups and Communities vulnerabilities

At a glance

CVE-2026-12687 is a medium-severity Improper Input Validation vulnerability in the ProfileGrid WordPress plugin, affecting versions < 5.9.9.8. It carries a CVSS score of 6.5 (reachable over the network; low attack complexity). Exploitation requires no authentication. The issue is fixed in version 5.9.9.8; sites on affected versions should update now. Disclosed July 2026, reported by Revanth Hari Narayana Matte.

Vulnerability Overview

The ProfileGrid – User Profiles, Groups and Communities plugin for WordPress is vulnerable to Registration Bypass in all versions up to 5.9.9.8 (exclusive). This makes it possible for unauthenticated attackers to register in groups that they should not be able to.

Technical Analysis

The vector marks this flaw as remotely reachable over the network, with low attack complexity — no special timing or configuration is needed, and no privileges on the target site, and no interaction from a victim user.

CWE-20: Improper Input Validation

Reaching this weakness in ProfileGrid < 5.9.9.8 takes no account at all. Improper input validation means the application accepts input without confirming it has the form, type or range the code downstream assumes.

The concrete impact depends on where the unvalidated value lands, which is why records in this class range from cosmetic bugs to full compromise. For ProfileGrid the fix is 5.9.9.8: builds < 5.9.9.8 are affected, anything from 5.9.9.8 onward is not.

Remediation

Update to version 5.9.9.8, or a newer patched version

How WordSec helps

Requests carrying this pattern arrive without a session, so nothing upstream of the firewall gets a chance to reject them: WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: ProfileGrid 5.9.9.8 closes this, and updating the plugin is the step that ends it.

Firewall
Login Security
Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2026-12687 https://www.wordfence.com/threat-intel/vulnerabilities/id/5c28577f-d405-4120-808e-62d0bd9398ac https://nvd.nist.gov/vuln/detail/CVE-2026-12687

Related records

Other vulnerabilities in ProfileGrid – User Profiles, Groups and Communities

CVSS Vector

6.5

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

Base

Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredNone
User InteractionNone
ScopeUnchanged
ConfidentialityLow
IntegrityLow
AvailabilityNone

This record contains material that is subject to copyright

CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE®). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy.

https://www.cve.org/Legal/TermsOfUse

Defiant hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute this software vulnerability information. Any copy of the software vulnerability information you make for such purposes is authorized provided that you include a hyperlink to this vulnerability record and reproduce Defiant's copyright designation and this license in any such copy.

https://www.wordfence.com/wordfence-intelligence-terms-and-conditions/