CVE-2023-40330 HIGH

CVE-2023-40330: WordPress GD Security Headers Plugin <= 1.6.1 is vulnerable to Cross Site Scripting (XSS)

Vendor Milan Petrovic

Product GD Security Headers

Weakness CWE-79 · XSS

Published September 27, 2023

Last update April 28, 2026

View on NVD All CVEs

CVSS base score

7.1/10

Attack vector Network

Attack complexity Low

Privileges required None

User interaction Required

Confidentiality Low

Integrity Low

CVSS vector

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

What the vulnerability does

01Description

Unauth. Reflected Cross-Site Scripting (XSS) vulnerability in Milan Petrovic GD Security Headers plugin <= 1.6.1 versions.

Explanation of Vulnerability in Simple Terms

02Summary

GD Security Headers versions up to 1.6.1 contain a cross-site scripting (XSS) vulnerability that allows attackers to inject malicious scripts into the site. An attacker can craft a malicious link that, when clicked by a site visitor, executes JavaScript in the victim's browser. This can lead to session hijacking, credential theft, or defacement. The vulnerability affects the scope beyond the vulnerable component itself.

What an attacker can do

03Attacker Capabilities

Inject and execute malicious JavaScript in visitors' browsers via a crafted link.

Potential impact on your site

04Site Impact

Visitors' sessions and credentials can be compromised; site content can be altered or malware injected.

Conditions required to exploit

05Prerequisites

A site visitor must click an attacker-supplied link while logged in or visiting the site.

Key dates

06Disclosure timeline

September 27, 2023 CVE published

April 28, 2026 Record updated

External resources

07References

NVD — National Vulnerability Database https://nvd.nist.gov/vuln/detail/CVE-2023-40330 CWE — Common Weakness Enumeration https://cwe.mitre.org/data/definitions/79.html AskarLabs — CWE-79 write-up Cross-Site Scripting

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