CVE-2025-32379: koa XSS — Fix

Description

Koa is expressive middleware for Node.js using ES2017 async functions. In koa < 2.16.1 and < 3.0.0-alpha.5, passing untrusted user input to ctx.redirect() even after sanitizing it, may execute javascript code on the user who use the app. This issue is patched in 2.16.1 and 3.0.0-alpha.5.

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CVSS v3.1 Score

5.0

MEDIUM

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

Weakness Type (CWE)

CWE-79 Cross-site Scripting (XSS)

Affected Products

Vendor	Product	Versions
koajs	koa	< 2.16.1
koajs	koa	All
koajs	koa	All
koajs	koa	All
koajs	koa	All
koajs	koa	All

References

Advisories & Patches

https://github.com/koajs/koa/commit/ff25eb4a7f2392df46481fe86355161067687312 https://github.com/koajs/koa/security/advisories/GHSA-x2rg-q646-7m2v

Frequently Asked Questions

What is CVE-2025-32379? +

Koa is expressive middleware for Node.js using ES2017 async functions. In koa < 2.16.1 and < 3.0.0-alpha.5, passing untrusted user input to ctx.redirect() even after sanitizing it, may execute javascript code on the user who use the app. This issue is patched in 2.16.1 and 3.0.0-alpha.5. It has a CVSS v3.1 base score of 5.0 (MEDIUM).

How severe is CVE-2025-32379? +

CVE-2025-32379 has a CVSS v3.1 score of 5.0 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2025-32379? +

CVE-2025-32379 affects products from koajs, specifically: koa. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-32379? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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