What is CVE-2021-23495?

CVE-2021-23495 is a medium-severity vulnerability in Karma Project, classified under URL Redirection to Untrusted Site (Open Redirect). CVSS score: 5.4/10. Published 2022-02-25.

How severe is CVE-2021-23495?

Medium severity. CVSS v3 base score is 5.4 out of 10.

Open Redirect in Karma Project

CVE-2021-23495

The package karma before 6.3.16 are vulnerable to Open Redirect due to missing validation of the return_url query parameter.

Vulnerability class: Open Redirect

Published 2022-02-25 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.009 (57.7th percentile), scored 2026-10-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 58th percentile — 57.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: 0.000

Affected products

Karma Project
Karma — versions unspecified

Weakness classification (CWE)

CWE-601 — URL Redirection to Untrusted Site (Open Redirect)

References

snyk.io/vuln/SNYK-JS-KARMA-2396325 (Patch, Third Party Advisory)
snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-2412347 (Patch, Third Party Advisory)
github.com/karma-runner/karma/commit/ff7edbb2ffbcdd69761bece86b7dc1ef0740508d (Patch, Third Party Advisory)

Frequently asked questions

What is CVE-2021-23495?: CVE-2021-23495 is a medium-severity vulnerability in Karma Project, classified under URL Redirection to Untrusted Site (Open Redirect). CVSS score: 5.4/10. Published 2022-02-25.
How severe is CVE-2021-23495?: Medium severity. CVSS v3 base score is 5.4 out of 10.