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By the Year

In 2023 there have been 2 vulnerabilities in Citrix Gateway with an average score of 7.0 out of ten. Last year Gateway had 5 security vulnerabilities published. If vulnerabilities keep coming in at the current rate, it appears that number of security vulnerabilities in Gateway in 2023 could surpass last years number. Last year, the average CVE base score was greater by 1.36

Year Vulnerabilities Average Score
2023 2 7.00
2022 5 8.36
2021 7 7.16
2020 0 0.00
2019 0 0.00
2018 0 0.00

It may take a day or so for new Gateway vulnerabilities to show up in the stats or in the list of recent security vulnerabilties. Additionally vulnerabilities may be tagged under a different product or component name.

Recent Citrix Gateway Security Vulnerabilities

Unauthenticated denial of service

CVE-2022-27508 7.5 - High - January 26, 2023

Unauthenticated denial of service

Resource Exhaustion

Authenticated denial of service

CVE-2022-27507 6.5 - Medium - January 26, 2023

Authenticated denial of service

Resource Exhaustion

In certain Citrix products, information disclosure can be achieved by an authenticated VPN user when there is a configured SSL VPN endpoint

CVE-2019-18177 6.5 - Medium - December 26, 2022

In certain Citrix products, information disclosure can be achieved by an authenticated VPN user when there is a configured SSL VPN endpoint. This affects Citrix ADC and Citrix Gateway 13.0-58.30 and later releases before the CTX276688 update.

User login brute force protection functionality bypass

CVE-2022-27516 9.8 - Critical - November 08, 2022

User login brute force protection functionality bypass

Improper Restriction of Excessive Authentication Attempts

Remote desktop takeover

CVE-2022-27513 9.6 - Critical - November 08, 2022

Remote desktop takeover via phishing

Insufficient Verification of Data Authenticity

Unauthorized access to Gateway user capabilities

CVE-2022-27510 9.8 - Critical - November 08, 2022

Unauthorized access to Gateway user capabilities

authentification

Unauthenticated redirection to a malicious website

CVE-2022-27509 6.1 - Medium - July 28, 2022

Unauthenticated redirection to a malicious website

Open Redirect

An uncontrolled resource consumption vulnerability exists in Citrix ADC <13.0-83.27, <12.1-63.22 and 11.1-65.23

CVE-2021-22956 7.5 - High - December 07, 2021

An uncontrolled resource consumption vulnerability exists in Citrix ADC <13.0-83.27, <12.1-63.22 and 11.1-65.23 that could allow an attacker with access to NSIP or SNIP with management interface access to cause a temporary disruption of the Management GUI, Nitro API, and RPC communication.

Resource Exhaustion

A unauthenticated denial of service vulnerability exists in Citrix ADC <13.0-83.27, <12.1-63.22 and 11.1-65.23 when configured as a VPN (Gateway) or AAA virtual server could

CVE-2021-22955 7.5 - High - December 07, 2021

A unauthenticated denial of service vulnerability exists in Citrix ADC <13.0-83.27, <12.1-63.22 and 11.1-65.23 when configured as a VPN (Gateway) or AAA virtual server could allow an attacker to cause a temporary disruption of the Management GUI, Nitro API, and RPC communication.

Resource Exhaustion

A vulnerability has been discovered in Citrix ADC (formerly known as NetScaler ADC) and Citrix Gateway (formerly known as NetScaler Gateway)

CVE-2021-22920 6.5 - Medium - August 05, 2021

A vulnerability has been discovered in Citrix ADC (formerly known as NetScaler ADC) and Citrix Gateway (formerly known as NetScaler Gateway), and Citrix SD-WAN WANOP Edition models 4000-WO, 4100-WO, 5000-WO, and 5100-WO. These vulnerabilities, if exploited, could lead to a phishing attack through a SAML authentication hijack to steal a valid user session.

A vulnerability has been discovered in Citrix ADC (formerly known as NetScaler ADC) and Citrix Gateway (formerly known as NetScaler Gateway)

CVE-2021-22919 7.5 - High - August 05, 2021

A vulnerability has been discovered in Citrix ADC (formerly known as NetScaler ADC) and Citrix Gateway (formerly known as NetScaler Gateway), and Citrix SD-WAN WANOP Edition models 4000-WO, 4100-WO, 5000-WO, and 5100-WO. These vulnerabilities, if exploited, could lead to the limited available disk space on the appliances being fully consumed.

Allocation of Resources Without Limits or Throttling

A session fixation vulnerability exists in Citrix ADC and Citrix Gateway 13.0-82.45 when configured SAML service provider

CVE-2021-22927 8.1 - High - August 05, 2021

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.

Session Fixation

Citrix ADC and Citrix/NetScaler Gateway before 13.0-82.41, 12.1-62.23, 11.1-65.20 and Citrix ADC 12.1-FIPS before 12.1-55.238 suffer from improper access control

CVE-2020-8300 6.5 - Medium - June 16, 2021

Citrix ADC and Citrix/NetScaler Gateway before 13.0-82.41, 12.1-62.23, 11.1-65.20 and Citrix ADC 12.1-FIPS before 12.1-55.238 suffer from improper access control allowing SAML authentication hijack through a phishing attack to steal a valid user session. Note that Citrix ADC or Citrix Gateway must be configured as a SAML SP or a SAML IdP for this to be possible.

Citrix ADC and Citrix/NetScaler Gateway 13.0 before 13.0-76.29, 12.1-61.18, 11.1-65.20, Citrix ADC 12.1-FIPS before 12.1-55.238, and Citrix SD-WAN WANOP Edition before 11.4.0, 11.3.2, 11.3.1a, 11.2.3a, 11.1.2c, 10.2.9a suffers

CVE-2020-8299 6.5 - Medium - June 16, 2021

Citrix ADC and Citrix/NetScaler Gateway 13.0 before 13.0-76.29, 12.1-61.18, 11.1-65.20, Citrix ADC 12.1-FIPS before 12.1-55.238, and Citrix SD-WAN WANOP Edition before 11.4.0, 11.3.2, 11.3.1a, 11.2.3a, 11.1.2c, 10.2.9a suffers from uncontrolled resource consumption by way of a network-based denial-of-service from within the same Layer 2 network segment. Note that the attacker must be in the same Layer 2 network segment as the vulnerable appliance.

Resource Exhaustion

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