// For flags

CVE-2021-21671

jenkins: session fixation vulnerability

Severity Score

7.5
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

Jenkins 2.299 and earlier, LTS 2.289.1 and earlier does not invalidate the previous session on login.

Jenkins versiones 2.299 y anteriores, versiones LTS 2.289.1 y anteriores no invalidan la sesión anterior al iniciar sesión

Session fixation vulnerability was found in Jenkins. The existing session on login process are not invalidated and this allows an attacker to gain potentially additional access on Jenkins by using social engineering attack techniques on a target user.

*Credits: N/A
CVSS Scores
Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Attack Vector
Network
Attack Complexity
High
Authentication
None
Confidentiality
Partial
Integrity
Partial
Availability
Partial
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2021-01-04 CVE Reserved
  • 2021-06-30 CVE Published
  • 2024-03-15 EPSS Updated
  • 2024-08-03 CVE Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-384: Session Fixation
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Jenkins
Search vendor "Jenkins"
 Jenkins
Search vendor "Jenkins" for product "Jenkins"
 >= 2.266 < 2.300
Search vendor "Jenkins" for product "Jenkins" and version " >= 2.266 < 2.300"
-
Affected
Jenkins
Search vendor "Jenkins"
 Jenkins
Search vendor "Jenkins" for product "Jenkins"
 >= 2.277.1 < 2.289.2
Search vendor "Jenkins" for product "Jenkins" and version " >= 2.277.1 < 2.289.2"
lts
Affected