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CVE-2021-23495

22
FAUCET Score

CVE-2021-23495 describes an Open Redirect vulnerability in the Karma testing framework, specifically in versions prior to 6.3.16. This flaw, rated Medium severity (CVSS 6.1), allows an unauthenticated attacker to redirect users to arbitrary malicious sites by manipulating the 'return_url' query parameter, potentially leading to phishing or credential theft. There is no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
< 6.3.16CPE matchmatch criteria
cpe:2.3:a:karma_project:karma:*:*:*:*:*:node.js:*:*

CVSS Data

CVSS version used by this source: 3.1

5.4MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
2.8
Impact Score
2.5
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.88%
Probability of exploitation in next 30 days
EPSS Percentile
55.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0088 is in the 66th percentile among its peer group of 26,234 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

github_advisorypatch availablevia nvd_reference
View patch
npmpatch availablevia ghsa
Product: karmaFixed in: 6.3.16

Vendor Advisories (1)

npmGHSA-rc3x-jf5g-xvc5medium

Open redirect in karma

Feb 26, 2022

References

github.com / karma-runner/karma/commit/ff7edbb2ffbcdd69761bece86b7dc1ef0740508d
PatchThird Party Advisory
snyk.io / vuln/SNYK-JAVA-ORGWEBJARSNPM-2412347
PatchThird Party Advisory
snyk.io / vuln/SNYK-JS-KARMA-2396325
PatchThird Party Advisory