CVE-2021-22920: citrix application_delivery_management Improper Access Control
Vulnerability summary
CVE-2021-22920 is a medium (CVSS 6.5) Improper Access Control vulnerability in citrix application_delivery_management. EPSS estimates a 0.92% chance of exploitation in the next 30 days, higher than 59.5% of scored vulnerabilities.
Timeline
- 05-08-2021PublishedVulnerability first disclosed.
- 03-08-2024Last modifiedVulnerability information updated.
Description
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.
CVSS metrics
2 scores · 1 source · 2 versionsEPSS trend
Probability
0.92%
Chance of exploitation in the next 30 days
Percentile
60%
Versus all other CVEs
30-day change
0.00 pp
From 0.92% on 18-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Citrix2 products
- application_delivery_management12.1-62.25 | 13.0-82.42
- gateway12.1-62.25 | 13.0-82.42
1 vendor · 2 products