How severe is CVE-2021-22936?

CVE-2021-22936 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2021-22936 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (54th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-22936?

CVE-2021-22936 primarily affects Ivanti Connect Secure. In total, 13 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-22936?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-22936 published?

CVE-2021-22936 was published on 2021-08-16 and last updated on 2026-06-17.

CVE-2021-22936

CVE-2021-22936 is a medium-severity vulnerability in Ivanti Connect Secure with a CVSS 3.x base score of 6.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-79.

Key facts

Severity: Medium (CVSS 3.x base score 6.1)
CVSS v2: 4.3
EPSS exploit prediction: 1% (54th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Ivanti Connect Secure
Published: 2021-08-16
Last modified: 2026-06-17

Description

A vulnerability in Pulse Connect Secure before 9.1R12 could allow a threat actor to perform a cross-site script attack against an authenticated administrator via an unsanitized web parameter.

Frequently asked questions

What is CVE-2021-22936?: A vulnerability in Pulse Connect Secure before 9.1R12 could allow a threat actor to perform a cross-site script attack against an authenticated administrator via an unsanitized web parameter.
How severe is CVE-2021-22936?: CVE-2021-22936 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2021-22936 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (54th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-22936?: CVE-2021-22936 primarily affects Ivanti Connect Secure. In total, 13 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-22936?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-22936 published?: CVE-2021-22936 was published on 2021-08-16 and last updated on 2026-06-17.

References

https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA44858/?kA23Z000000L6oySAC

Affected products (13)

cpe:2.3:a:ivanti:connect_secure:9.1:-:*:*:*:*:*:*
cpe:2.3:a:ivanti:connect_secure:9.1:r1.0:*:*:*:*:*:*
cpe:2.3:a:ivanti:connect_secure:9.1:r10.0:*:*:*:*:*:*
cpe:2.3:a:ivanti:connect_secure:9.1:r11.0:*:*:*:*:*:*
cpe:2.3:a:ivanti:connect_secure:9.1:r2.0:*:*:*:*:*:*
cpe:2.3:a:ivanti:connect_secure:9.1:r3.0:*:*:*:*:*:*
cpe:2.3:a:ivanti:connect_secure:9.1:r4.0:*:*:*:*:*:*
cpe:2.3:a:ivanti:connect_secure:9.1:r5.0:*:*:*:*:*:*
cpe:2.3:a:ivanti:connect_secure:9.1:r6.0:*:*:*:*:*:*
cpe:2.3:a:ivanti:connect_secure:9.1:r7.0:*:*:*:*:*:*
cpe:2.3:a:ivanti:connect_secure:9.1:r8.0:*:*:*:*:*:*
cpe:2.3:a:ivanti:connect_secure:9.1:r9.0:*:*:*:*:*:*
cpe:2.3:a:pulsesecure:pulse_connect_secure:*:*:*:*:*:*:*:*

More vulnerabilities in Ivanti Connect Secure

CVE-2021-22893 — Critical (CVSS 10.0): Pulse Connect Secure 9.0R3/9.1R1 and higher is vulnerable to an authentication bypass vulnerability exposed by the…
CVE-2019-11510 — Critical (CVSS 10.0): In Pulse Secure Pulse Connect Secure (PCS) 8.2 before 8.2R12.1, 8.3 before 8.3R7.1, and 9.0 before 9.0R3.4, an…
CVE-2016-4787 — Critical (CVSS 10.0): Pulse Connect Secure (PCS) 8.2 before 8.2r1, 8.1 before 8.1r2, 8.0 before 8.0r10, and 7.4 before 7.4r13.4 allow remote…
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CVE-2024-21894 — Critical (CVSS 9.8): A heap overflow vulnerability in IPSec component of Ivanti Connect Secure (9.x, 22.x) and Ivanti Policy Secure allows…
CVE-2018-20813 — Critical (CVSS 9.8): An input validation issue has been found with login_meeting.cgi in Pulse Secure Pulse Connect Secure 8.3RX before 8.3R2.

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