CVE-2023-29434 MEDIUM

CVE-2023-29434: WordPress Optin Forms Plugin <= 1.3.1 is vulnerable to Cross Site Scripting (XSS)

Vendor Fancythemes

Product Optin Forms – Simple List Building Plugin for WordPress

Weakness CWE-79 · XSS

Published June 26, 2023

Last update April 28, 2026

View on NVD All CVEs

CVSS base score

5.9/10

Attack vector Network

Attack complexity Low

Privileges required High

User interaction Required

Confidentiality Low

Integrity Low

CVSS vector

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

What the vulnerability does

01Description

Auth. (admin+) Stored Cross-Site Scripting (XSS) vulnerability in FancyThemes Optin Forms – Simple List Building Plugin for WordPress plugin <= 1.3.1 versions.

Explanation of Vulnerability in Simple Terms

02Summary

The Optin Forms plugin for WordPress contains a stored cross-site scripting (XSS) vulnerability in versions up to 1.3.1. An authenticated admin user with high privileges can inject malicious scripts that execute in the browsers of other site visitors. The vulnerability requires user interaction and affects the integrity and confidentiality of the site.

What an attacker can do

03Attacker Capabilities

Inject malicious scripts that run in visitors' browsers to steal data or perform actions on their behalf.

Potential impact on your site

04Site Impact

Visitors' browsers can be compromised; their session data or credentials may be stolen by a malicious admin.

Conditions required to exploit

05Prerequisites

Admin-level access to the WordPress site; victim must visit an affected page.

Key dates

06Disclosure timeline

June 26, 2023 CVE published

April 28, 2026 Record updated

External resources

07References

NVD — National Vulnerability Database https://nvd.nist.gov/vuln/detail/CVE-2023-29434 CWE — Common Weakness Enumeration https://cwe.mitre.org/data/definitions/79.html AskarLabs — CWE-79 write-up Cross-Site Scripting

Related vulnerabilities

Identifiers

CVE CVE-2023-29434

CWE CWE-79

CVSS 5.9 / MEDIUM

Affected versions