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CVE-2021-22900: Ivanti Pulse Connect Secure Unrestricted File Upload Vulnerability

criticalknown exploitedCVE-2021-22900
Actively exploited. At least one CVE in this advisory is listed in the CISA Known Exploited Vulnerabilities catalog — exploitation has been observed in the wild. Treat remediation as urgent.
Ivanti Pulse Connect Secure contains an unrestricted file upload vulnerability that allows an authenticated administrator to perform a file write via a maliciously crafted archive upload in the administrator web interface.

CSIRTS triage

vendor: Ivantiproduct: Pulse Connect SecureOther
What
Ivanti Pulse Connect Secure contains an unrestricted file upload vulnerability that allows an authenticated administrator to perform a file write via a maliciously crafted archive upload in the administrator web interface.
Who is affected
Authenticated administrators of Ivanti Pulse Connect Secure are affected.
Urgency
Remediation is urgent as the vulnerability is critical and has been exploited.
Action
Users should apply the latest security patches from Ivanti.

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

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Details

Source
CISA Known Exploited Vulnerabilities (US · database · site)
Severity
critical
Published
2021-11-03
Exploitation
Observed in the wild (CISA KEV)

Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2021-22900

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Referenced CVEs

CVECSIRTS overviewExternal
CVE-2021-22900coverage & exploitation statusNVD · CVE.org

Recent advisories for Ivanti Pulse Connect

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

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