What’s Vulnerable › Vulnerabilities

CVE-2021-32696: Passing in a non-string 'html' argument can lead to unsanitized output

• Severity: medium (CVSS 5.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-06-18 · updated 2026-06-17
• Weakness: CWE-79

Description

The npm package "striptags" is an implementation of PHP's strip_tags in Typescript. In striptags before version 3.2.0, a type-confusion vulnerability can cause `striptags` to concatenate unsanitized strings when an array-like object is passed in as the `html` parameter. This can be abused by an attacker who can control the shape of their input, e.g. if query parameters are passed directly into the function. This can lead to a XSS.

Affected products

• ericnorris striptags: before 3.2.0 — fixed in 3.2.0

How to fix

Upgrade to a fixed version: ericnorris striptags 3.2.0. Check the vendor advisory for mitigations.

References

• https://github.com/ericnorris/striptags/commit/f252a6b0819499cd65403707ebaf5cc925f2faca
• https://github.com/ericnorris/striptags/releases/tag/v3.2.0
• https://github.com/ericnorris/striptags/security/advisories/GHSA-qxg5-2qff-p49r
• https://www.npmjs.com/package/striptags
• https://github.com/ericnorris/striptags/commit/f252a6b0819499cd65403707ebaf5cc925f2faca
• https://github.com/ericnorris/striptags/releases/tag/v3.2.0
• https://github.com/ericnorris/striptags/security/advisories/GHSA-qxg5-2qff-p49r
• https://www.npmjs.com/package/striptags

Get alerted when CVE-2021-32696 or the next vulnerability affects your stack