PatchTheCVECVE-2021-23664: The package @isomorphic-git/cors-proxy before 2.7.1 are vulnerable to Server-side Request Forgery (SSRF) due t
CVE-2021-23664 is a high-severity flaw (CVSS 8.6) affecting cors-proxy. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
The package @isomorphic-git/cors-proxy before 2.7.1 are vulnerable to Server-side Request Forgery (SSRF) due to missing sanitization and validation of the redirection action in middleware.js.
Why this priority
- High severity
- Public exploit reference
- Remotely exploitable, no login, no user action
A fixed release or distro patch exists.
Risk facts
| CVSS score | 8.6 (High) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | None |
| User interaction | None |
| EPSS exploit chance | 1.4% (top 28%) |
| CISA exploited list | No |
| Weakness | CWE-918 |
| Published | 2022-01-21 |
| Last modified | 2026-06-17 |
Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2021-23664?
cors-proxy: upgrade to 2.7.1. Exact commands for each OS are on this page.
Is CVE-2021-23664 being exploited?
CVE-2021-23664 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2021-23664 affect?
CVE-2021-23664 affects cors-proxy. Severity is high (CVSS 8.6). The package @isomorphic-git/cors-proxy before 2.7.1 are vulnerable to Server-side Request Forgery (SSRF) due to missing sanitization and validation of the redirection action in middleware.js.
How urgent is CVE-2021-23664?
Priority 58/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action