Reference page — cumulative record through Monday, October 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2021-22923

CVE-2021-22923MEDIUM

n/a https://github.com/curl/curl — When curl is instructed to get content using the metalink feature, and a user name and password are used to download the metalink XML fil…

  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   N   H   N   R  U  H  N  N    5.3   .0200   80.5     —

AFFECTED
  Product                       Versions                               Fixed
  https://github.com/curl/curl  curl 7.27.0 to and including 7.77.0 –  —

TIMELINE
  Jan 6   Reserved by hackerone
  Aug 5   Published (CNA: hackerone)
  Oct 14  ENRICHED — CVE-2021-22923 (https://github.com/curl/curl). Received CVSS 5.3 and CPE data from NVD.
  Oct 14  EXPLOIT PUBLISHED — CVE-2021-22923 (https://github.com/curl/curl). Public exploit reference added.

CWE-319, CWE-522 · CNA: hackerone · CVSS v3.1 · 8 references · NVD status: Modified

Description

When curl is instructed to get content using the metalink feature, and a user name and password are used to download the metalink XML file, those same credentials are then subsequently passed on to each of the servers from which curl will download or try to download the contents from. Often contrary to the user's expectations and intentions and without telling the user it happened.

Lifecycle

Complete event history — 4 events, chronological
Date	Event	Detail
January 6, 2021	Reserved	Reserved by hackerone
August 5, 2021	Published	Published (CNA: hackerone)
October 14, 2026	ENRICHED	ENRICHED — CVE-2021-22923 (https://github.com/curl/curl). Received CVSS 5.3 and CPE data from NVD.
October 14, 2026	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2021-22923 (https://github.com/curl/curl). Public exploit reference added.

Affected

Affected products and packages — 1 row
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
n/a	https://github.com/curl/curl	—	curl 7.27.0 to and including 7.77.0	—

Weaknesses

CWE-319 · CWE-522

References (8)

https://cert-portal.siemens.com/productcert/html/ssa-389290.html
https://cert-portal.siemens.com/productcert/html/ssa-398330.html
https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf [Patch, Third Party Advisory]
https://hackerone.com/reports/1213181 [Exploit, Issue Tracking, Third Party Advisory]
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FRUCW2UVNYUDZF72DQLFQR4PJEC6CF7V/ [Mailing List, Third Party Advisory]
https://security.gentoo.org/glsa/202212-01 [Third Party Advisory]
https://security.netapp.com/advisory/ntap-20210902-0003/ [Third Party Advisory]
https://www.oracle.com/security-alerts/cpuoct2021.html [Patch, Third Party Advisory]

Authoritative record: CVE-2021-22923 at cve.org

Weaknesses: CWE-319 · CWE-522

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2021-22923 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Monday, October 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.