CVE-2021-21973

criticalknown exploitedpublic exploitcovered by 1 sourcefirst seen 2022-03-07

Actively exploited. CVE-2021-21973 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2022-03-07) — exploitation has been observed in the wild, and US federal agencies are required to remediate it under BOD 22-01. Treat patching as urgent.

Public exploit code is available. Proof-of-concept or working exploit code for CVE-2021-21973 is indexed in GitHub PoC and Nuclei. Expect opportunistic scanning and exploitation attempts — prioritize remediation.

VMware vCenter Server and Cloud Foundation Server contain a SSRF vulnerability due to improper validation of URLs in a vCenter Server plugin. This allows for information disclosure.

CSIRTS triage

What: VMware vCenter Server contains a SSRF vulnerability due to improper validation of URLs in a vCenter Server plugin.
Who is affected: Users of VMware vCenter Server and Cloud Foundation who have not updated their systems.
Urgency: Remediation is critical due to active exploitation and the potential for information disclosure.
Action: Update to the latest version of vCenter Server.

AI-assisted analysis generated from the source advisory — verify against the original.

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Exploitation outlook

Exploitation confirmedAlready exploited in the wild (CISA KEV) — the prediction phase is over. Patch now. Riskier than 100% of all EPSS-scored CVEs.

Exploit availability

Public exploit or proof-of-concept code for CVE-2021-21973 is indexed in these free datasets. Available exploit code raises real-world risk independent of the CVSS score.

GitHub PoCPublic proof-of-concept repositories on GitHub reference this CVE.look it up ↗
NucleiA nuclei-templates detection/PoC template exists for this CVE.look it up ↗

Advisory coverage (1)

criticalexploitedCVE-2021-21973: VMware vCenter Server and Cloud Foundation Server Side Request Forgery (SSRF) Vulnerabilitycisa-kev · 2022-03-07

External references

NVD record for CVE-2021-21973

CVE.org record

CISA KEV catalog

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