CVE-2020-8300

Name: CVE-2020-8300
Creator: NVD / NIST
Published: 2021-06-16T14:15:08.44+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.5/10EPSS 3.01%

Last modified Jun 17, 2026

CVE-2020-8300 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. 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.. EPSS estimates a 3.01% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1

6.5/10

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

EPSS Probability

3.01%

85.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-284

Affected Software

Vendor	Product	Versions
Citrix	Gateway	>= 12.1, < 12.1-62.23
Citrix	Gateway	>= 13.0, < 13.0-82.41
Citrix	Netscaler Gateway	>= 11.1, < 11.1-65.20
Citrix	Application Delivery Controller Firmware	>= 11.1, < 11.1-65.20
Citrix	Application Delivery Controller Firmware	>= 12.1, < 12.1-62.23
Citrix	Application Delivery Controller Firmware	>= 13.0, < 13.0-82.41
Citrix	Application Delivery Controller Firmware	>= 12.1, < 12.1-55.238

References

https://support.citrix.com/article/CTX297155Vendor Advisory
https://support.citrix.com/article/CTX297155Vendor Advisory

Timeline

Published: Jun 16, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-8300?

How severe is CVE-2020-8300?

CVE-2020-8300 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 3.01% probability of exploitation in the next 30 days.

How do I fix CVE-2020-8300?

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-2020-8300?

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

Scan your code now

Source: NVD / NIST