CVE-2025-6831Network attack vector

Stored XSS via unescaped shortcode attributes

Published Jul 22, 2025 · Updated Apr 8, 2026

Stored XSS in WPEverest User Registration & Membership 4.2.4 and earlier allows remote authenticated users to inject scripts. The urcr_restrict shortcode incorporates user-supplied attributes into generated page markup without adequate sanitization or output escaping. The stored script executes whenever another user opens the affected page; contributor-level access or higher is required.

CVSS severity6.4
Medium
EPSS probability0.31%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in WPEverest User Registration & Membership 4.2.4 and earlier allows remote authenticated users to inject scripts. The urcr_restrict shortcode incorporates user-supplied attributes into generated page markup without adequate sanitization or output escaping. The stored script executes whenever another user opens the affected page; contributor-level access or higher is required.

The record

CVE
CVE-2025-6831
Published
Jul 22, 2025
Updated
Apr 8, 2026
Vendor
WPEverest
Product
User Registration & Membership
Classifications
CWE-79, T1203
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 22, 2025CVE publishedPublication date reported by the CVE source.
  2. Apr 8, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=4.2.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

WPEverest · User Registration & Membershipversion=0 <=4.2.4

Published CVSS scores

6.4WordfenceCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1203Exploitation for Client Execution

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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