CVE-2025-5699: Developer Formatter <= 2015.0.2.1 - Authenticated (Administrator+) Stored Cross-Site Scripting via Custom CSS
Description
The Developer Formatter plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the Custom CSS in all versions up to, and including, 2015.0.2.1 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with administrator-level access, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This only affects multi-site installations and installations where unfiltered_html has been disabled.
Classification
CVE ID: CVE-2025-5699
CVSS Base Severity: MEDIUM
CVSS Base Score: 5.5
CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:N
Problem Types
CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')Affected Products
Vendor: gsaraiva
Product: Developer Formatter
Exploit Prediction Scoring System (EPSS)
EPSS Score: 0.03% (probability of being exploited)
EPSS Percentile: 6.17% (scored less or equal to compared to others)
EPSS Date: 2025-06-06 (when was this score calculated)
References
https://nvd.nist.gov/vuln/detail/CVE-2025-5699https://www.wordfence.com/threat-intel/vulnerabilities/id/63192a95-778b-452b-9081-cf20dc7f7ec1?source=cve
https://plugins.trac.wordpress.org/browser/devformatter/trunk/devinterface.php
https://wordpress.org/plugins/devformatter/#developers
https://plugins.trac.wordpress.org/browser/devformatter/trunk/devfmt_css.php