---
id: CVE-2025-13971
title: >-
  The TWW Protein Calculator plugin for WordPress is vulnerable to Stored
  Cross-Site Scripting via the 'Header' setting in all versions up to, and
  including, 1.0.24 due to insufficient input sanitization and output escaping
summary: >-
  The TWW Protein Calculator plugin for WordPress is vulnerable to Stored
  Cross-Site Scripting via the 'Header' setting in all versions up to, and
  including, 1.0.24 due to insufficient input sanitization and output escaping.
  This makes it …
severity: medium
cvss: 4.4
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:N'
cwe:
  - CWE-79
published: '2025-12-12'
updated: '2026-10-07'
sourceUpdated: '2026-10-07T20:10:01.970'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-13971'
references:
  - url: >-
      https://plugins.trac.wordpress.org/browser/twwc-protein/tags/1.0.24/templates/protein-calculator-compact.php#L19
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/browser/twwc-protein/tags/1.0.24/templates/protein-calculator-large.php#L32
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/browser/twwc-protein/trunk/templates/protein-calculator-compact.php#L19
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/browser/twwc-protein/trunk/templates/protein-calculator-large.php#L32
    label: security@wordfence.com
  - url: >-
      https://www.wordfence.com/threat-intel/vulnerabilities/id/b57749db-0a47-44f8-8607-d0d962c5ced2?source=cve
    label: security@wordfence.com
tags:
  - nvd
epss: 0.00232
epssPercentile: 0.12853
ingestedAt: '2026-10-07T20:46:46.881Z'
---

## Overview

The TWW Protein Calculator plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'Header' setting in all versions up to, and including, 1.0.24 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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.