CVE-2021-22900

Name: CVE-2021-22900
Creator: NVD / NIST
Published: 2021-05-27T12:15:07.997+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.2/10Actively ExploitedEPSS 14.15%

Last modified Jun 17, 2026

CVE-2021-22900 is a high-severity vulnerability rated 7.2/10 on the CVSS scale. A vulnerability allowed multiple unrestricted uploads in Pulse Connect Secure before 9.1R11.4 that could lead to an authenticated administrator to perform a file write via a maliciously crafted archive upload in the administrator web interface.. CISA has confirmed active exploitation in the wild. EPSS estimates a 14.15% chance of exploitation in the next 30 days.

Description

A vulnerability allowed multiple unrestricted uploads in Pulse Connect Secure before 9.1R11.4 that could lead to an authenticated administrator to perform a file write via a maliciously crafted archive upload in the administrator web interface.

Metrics

CVSS 3.1

7.2/10

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

14.15%

96.1th percentile

Probability of exploitation in the next 30 days. Learn more

Exploitation Status

This vulnerability is listed in CISA’s Known Exploited Vulnerabilities catalog, confirming active exploitation in the wild. Federal agencies must remediate by May 3, 2022.

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Ivanti	Connect Secure	9.0
Ivanti	Connect Secure	9.1
Pulsesecure	Pulse Connect Secure	<= 9.1

References

https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA44784/?kA23Z000000boUWSAYBroken Link, Vendor Advisory
https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA44784/?kA23Z000000boUWSAYBroken Link, Vendor Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-22900US Government Resource

Timeline

Published: May 27, 2021
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2021-22900?

How severe is CVE-2021-22900?

CVE-2021-22900 has a CVSS score of 7.2/10 (HIGH severity). The EPSS model estimates a 14.15% probability of exploitation in the next 30 days. This vulnerability is listed in CISA's Known Exploited Vulnerabilities catalog.

How do I fix CVE-2021-22900?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-22900?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST