Is CVE-2021-22927 in the CISA KEV catalog?

No. CVE-2021-22927 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-22927?

CVE-2021-22927 has a CVSS v3 base score of 8.1 (HIGH).

What is the EPSS score for CVE-2021-22927?

CVE-2021-22927 has an EPSS score of 0.84% (53th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-22927?

Upgrade application delivery controller firmware to 12.1-55.238 or later. Fixes are available for 3 affected products.

CVE & CISA-KEV Catalog

CVE-2021-22927

HIGH

8.1

CVSS v3

NVD

Description

A session fixation vulnerability exists in Citrix ADC and Citrix Gateway 13.0-82.45 when configured SAML service provider that could allow an attacker to hijack a session.

CWE-384

How to fix

Remediation Available

application delivery controller firmwareNVD

Affected:>= 12.1, < 12.1-55.238Fixed in:12.1-55.238CVE-2021-22927derived from NVD

gatewayNVD

Affected:>= 13.0, < 13.0-82.45Fixed in:13.0-82.45CVE-2021-22927derived from NVD

netscaler gatewayNVD

Affected:>= 11.1, < 11.1-65.22Fixed in:11.1-65.22CVE-2021-22927derived from NVD

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionRequired

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityNone

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

Exploit Intelligence

0.84%probability of exploitation in 30 days

53rdpercentile

Moderate risk: more likely to be exploited than 53% of all known CVEs.

References

Vendor Advisory1

support.citrix.com

Related Vulnerabilities

Other CWE-384 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2018-11714	Critical	9.8	37%	-	-
CVE-2018-18925	Critical	9.8	32%	-	-
CVE-2019-12258	High	7.5	23%	-	Fix
CVE-2018-17199	High	7.5	20%	-	Fix
CVE-2019-10008	High	8.8	20%	-	-
CVE-2024-50339	Medium	5.3	20%	-	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.