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CVE-2021-23664

25
FAUCET Score

CVE-2021-23664 describes a Server-Side Request Forgery (SSRF) vulnerability in the @isomorphic-git/cors-proxy package prior to version 2.7.1, stemming from insufficient sanitization and validation of redirection actions. With a CVSS score of 7.5 (High), this vulnerability can be exploited remotely without authentication, potentially leading to information disclosure. There is currently no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 2.7.1CPE matchmatch criteria
cpe:2.3:a:isomorphic-git:cors-proxy:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

8.6HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
4.0
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.39%
Probability of exploitation in next 30 days
EPSS Percentile
69.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0139 is in the 50th percentile among its peer group of 51,553 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 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: @isomorphic-git/cors-proxyFixed in: 2.7.1

Vendor Advisories (1)

npmGHSA-v82v-rq72-phq9high

Server side request forgery in @isomorphic-git/cors-proxy

Jan 26, 2022

References

github.com / isomorphic-git/cors-proxy/commit/1b1c91e71d946544d97ccc7cf0ac62b859e03311
PatchThird Party Advisory
snyk.io / vuln/SNYK-JS-ISOMORPHICGITCORSPROXY-1734788
ExploitPatchThird Party Advisory