CVE-2021-22927: citrix application_delivery_controller Session Fixation
CVSS: 8.1v3.1HighModified
Published 05-08-2021Last modified 03-08-2024
Vulnerability summary
CVE-2021-22927 is a high (CVSS 8.1) Session Fixation vulnerability in citrix application_delivery_controller. EPSS estimates a 0.84% chance of exploitation in the next 30 days, higher than 57% of scored vulnerabilities.
CVSS score
8.1/10
010
High · v3.1 (NVD)EPSS score
0.84%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Timeline
- 05-08-2021PublishedVulnerability first disclosed.
- 03-08-2024Last modifiedVulnerability information updated.
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.
CVSS metrics
2 scores · 1 source · 2 versionsHigh 8.1Preferred score · NVD (NIST)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:NSourcesSingle source
Medium 5.8Preferred score · NVD (NIST)
AV:N/AC:M/Au:N/C:P/I:P/A:NSourcesSingle source
EPSS trend
Probability
0.84%
Chance of exploitation in the next 30 days
Percentile
57%
Versus all other CVEs
30-day change
0.00 pp
From 0.84% on 18-09-2026
18-09-202618-10-2026
EPSS score0.84%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Citrix3 products
- application_delivery_controller≥ 11.1, < 11.1-65.22 | ≥ 12.1, < 12.1-62.27 | ≥ 13.0, < 13.0-82.45 | ≥ 12.1, < 12.1-55.238
- gateway≥ 12.1, < 12.1-62.27 | ≥ 13.0, < 13.0-82.45
- netscaler_gateway≥ 11.1, < 11.1-65.22
1 vendor · 3 products