What is CVE-2023-23914?

CVE-2023-23914 is a critical-severity vulnerability in Haxx Curl, classified under Cleartext Transmission of Sensitive Information. CVSS score: 9.1/10. Published 2023-02-23.

How severe is CVE-2023-23914?

Critical severity. CVSS v3 base score is 9.1 out of 10.

Is CVE-2023-23914 known to be exploited?

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

Vulnerability in Haxx Curl

CVE-2023-23914

A cleartext transmission of sensitive information vulnerability exists in curl <v7.88.0 that could cause HSTS functionality fail when multiple URLs are requested serially. Using its HSTS support, curl can be instructed to use HTTPS instead of usingan insecure clear-text HTTP step even when HTTP is provided in the URL. ThisHSTS mechanism would however surprisingly be ignored by subsequent transferswhen done on the same command line because the state would not be properlycarried on.

EPSS: 0.009 (56.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N.

Affected products

Weakness classification (CWE)

CWE-319 — Cleartext Transmission of Sensitive Information

Public proof-of-concept exploits

References

support@hackerone.com (Exploit, Issue Tracking)
support@hackerone.com (Third Party Advisory)
support@hackerone.com (vendor-advisory, Third Party Advisory)

Frequently asked questions

What is CVE-2023-23914?: CVE-2023-23914 is a critical-severity vulnerability in Haxx Curl, classified under Cleartext Transmission of Sensitive Information. CVSS score: 9.1/10. Published 2023-02-23.
How severe is CVE-2023-23914?: Critical severity. CVSS v3 base score is 9.1 out of 10.
Is CVE-2023-23914 known to be exploited?: 10 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.