What is CVE-2025-32379?

CVE-2025-32379 is a medium-severity vulnerability in Koajs Koa, classified under Cross-site Scripting. CVSS score: 5.0/10. Published 2025-04-09.

How severe is CVE-2025-32379?

Medium severity. CVSS v3 base score is 5.0 out of 10.

Is CVE-2025-32379 known to be exploited?

2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

XSS in Koajs Koa

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. T…

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.002 (13.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.0 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:L.

Affected products

Koajs Koa — versions >= 3.0.0-alpha.0, < 3.0.0-alpha.5, 3.0.0, < 2.16.1

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

Public proof-of-concept exploits

References

security-advisories@github.com (x_refsource_CONFIRM, Patch, Vendor Advisory)
security-advisories@github.com (Patch, x_refsource_MISC)

Frequently asked questions

What is CVE-2025-32379?: CVE-2025-32379 is a medium-severity vulnerability in Koajs Koa, classified under Cross-site Scripting. CVSS score: 5.0/10. Published 2025-04-09.
How severe is CVE-2025-32379?: Medium severity. CVSS v3 base score is 5.0 out of 10.
Is CVE-2025-32379 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.