CVE-2025-23888

WordPress Custom Page Extensions Plugin <= 0.6 - Cross Site Scripting (XSS) vulnerability

Published Jan 24, 2025 CVSS 3.1 · 7.1 High EPSS < 1% KEV · Not listed

Description

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in GrandSlambert Custom Page Extensions custom-page-extensions allows Reflected XSS.This issue affects Custom Page Extensions: from n/a through <= 0.6.

Analysis

Technical impact

An improper neutralization of input during web page generation allows a reflected XSS vulnerability in the GrandSlambert Custom Page Extensions plugin for WordPress. This weakness can enable an attacker to inject and execute arbitrary client‑side script in the browser context of a site that uses the vulnerable plugin. The flaw is identified as CWE‑79.

Affected Systems

Custom Page Extensions, a WordPress plugin distributed by GrandSlambert, is affected in all releases up to and including version 0.6. No newer versions were listed as vulnerable, but the issue is present in every plugin version <=0.6.

Risk and Exploitability

The CVSS score of 7.1 indicates a high severity of the vulnerability, while the EPSS score of less than 1% suggests a very low probability of exploitation in the wild. The vulnerability is not listed in the CISA KEV catalog. Based on the description, it is inferred that the attack likely requires a victim to be tricked into visiting a crafted URL or submitting malicious input that the plugin echoes back, which would allow the injected script to execute. No system privilege escalation or authentication bypass is required.

Affected Products

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

GrandSlambert

Custom Page Extensions

unaffected

Version	Status	Constraints
`0`	affected	≤ 0.6

No data.

Vendor	Product	Versions
Wordpress	Wordpress	—

Remediation

No solution or workaround provided in the CVE record.

OpenCVE Recommended Actions

Install a newer version of Custom Page Extensions (any release greater than 0.6) if available.
If an upgrade is not possible, ensure that any data rendered by the plugin is properly escaped by using WordPress escaping functions such as esc_html(), esc_attr(), or esc_js() to prevent user input from forming executable scripts.
Disable the Custom Page Extensions plugin until a fixed version is released, and monitor the site for attempts to inject scripts.

Generated by OpenCVE AI on May 2, 2026 at 05:30 UTC.

Tracking

Advisories

Source	ID	Title
EUVD	EUVD-2025-3506	Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in NotFound Custom Page Extensions allows Reflected XSS. This issue affects Custom Page Extensions: from n/a through 0.6.

Metrics

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Changed

Confidentiality Impact Low

Integrity Impact Low

Availability Impact Low

User Interaction Required

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploit prediction score: < 1% (0.260% probability within 30 days)

Exploitation none

Automatable no

Technical Impact partial

References

Link	Providers
https://patchstack.com/database/Wordpress/Plugin/custom-page-extensions/vulnerability/wordpress-custom-page-extensions-plugin-0-6-cross-site-scripting-xss-vulnerability?_s_id=cve

History

Apr 23, 2026 3:00 PM Scoring metrics updated View changes

Type	Values Removed	Values Added
Metrics		cvssV3_1 `{'score': 7.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L'}`

Apr 1, 2026 11:45 PM Description updated. References updated. Scoring metrics updated View changes

Type	Values Removed	Values Added
Description	Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in NotFound Custom Page Extensions allows Reflected XSS. This issue affects Custom Page Extensions: from n/a through 0.6.	Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in GrandSlambert Custom Page Extensions custom-page-extensions allows Reflected XSS.This issue affects Custom Page Extensions: from n/a through <= 0.6.
References	https://patchstack.com/database/wordpress/plugin/custom-page-extensions/vulnerability/wordpress-custom-page-extensions-plugin-0-6-cross-site-scripting-xss-vulnerability?_s_id=cve	https://patchstack.com/database/Wordpress/Plugin/custom-page-extensions/vulnerability/wordpress-custom-page-extensions-plugin-0-6-cross-site-scripting-xss-vulnerability?_s_id=cve
Metrics	cvssV3_1 `{'score': 7.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L'}`	ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Jan 24, 2025 11:00 AM Description updated. Title updated. Weaknesses updated. Added references. Scoring metrics updated View changes

Type	Values Removed	Values Added
Description		Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in NotFound Custom Page Extensions allows Reflected XSS. This issue affects Custom Page Extensions: from n/a through 0.6.
Title		WordPress Custom Page Extensions Plugin <= 0.6 - Cross Site Scripting (XSS) vulnerability
Weaknesses		CWE-79
References		https://patchstack.com/database/wordpress/plugin/custom-page-extensions/vulnerability/wordpress-custom-page-extensions-plugin-0-6-cross-site-scripting-xss-vulnerability?_s_id=cve
Metrics		cvssV3_1 `{'score': 7.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L'}`