CVE-2025-23578

WordPress Custom CSS Addons plugin <= 1.9.1 - Reflected Cross Site Scripting (XSS) vulnerability

7.1 High

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Bastien Ho Custom CSS Addons css-addons allows Reflected XSS.This issue affects Custom CSS Addons: from n/a through <= 1.9.1.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: Required

What an attacker can affect

Confidentiality: Low
Integrity: Low
Availability: Low

Exploit likelihood

0.41%Up 0.4 points since Jan 23, 2025

What each source reports

CVE List Score used 7.1

WordPress Custom CSS Addons plugin <= 1.9.1 - Reflected Cross Site Scripting (XSS) vulnerability

Record: CVE-2025-23578
CVSS 3.1: 7.1 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L
Weakness: CWE-79
Updated: 2026-11-02

EUVDEUVD-2025-3260 7.1

Record: EUVD-2025-3260
CVSS 3.1: 7.1 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L
Updated: 2026-11-02

GitHub AdvisoriesGHSA-9pm6-fvgj-xj4x 7.1

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')...

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in NotFound Custom CSS Addons allows Reflected XSS. This issue affects Custom CSS Addons: from n/a through 1.9.1.

Record: GHSA-9pm6-fvgj-xj4x
CVSS 3.1: 7.1 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L
Weakness: CWE-79
Updated: 2026-11-02

NVD 7.1

Record: CVE-2025-23578
CVSS 3.1: 7.1 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L
Weakness: CWE-79
Updated: 2026-11-02

Affected products

History

History
Recorded	Changed	Sources
Nov 2, 2026	first indexed	CVE List, EUVD, GitHub Advisories, NVD

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2025-23578 is a high vulnerability (CVSS 7.1) in Bastien Ho Custom Css Addons, published January 22, 2025. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.41%, the 35th percentile. No source names a fixed version.