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Vulnerability record · CVE-2025-32379 · published 9 April 2025

CVE-2025-32379: Koajs koa cross-site scripting vulnerability

KKoajs · Koa

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.

6.1 CVSS 3.1 Medium EPSS 0.26% · top 84.4% CWE-79 · Cross-site scripting
6.1CVSS 3.1 base score
0.26%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References
17 Jun 2026Last modified by NVD

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.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

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

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Source: NIST National Vulnerability Database (record CVE-2025-32379), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.