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Medium

Jenkins Diagnostic page exposed session cookies

  • Disclosed: 24.05.2022
  • Updated: 11.10.2026 11:21

Jenkins shows various technical details about the current user on the /whoAmI page. In a previous fix, the Cookie header value containing the HTTP session ID was redacted. However, user metadata shown on this page could also include the HTTP session ID in Jenkins 2.218 and earlier, LTS 2.204.1 and earlier.

This allows attackers able to exploit a cross-site scripting vulnerability to obtain the HTTP session ID value from this page.

Jenkins 2.219, LTS 2.204.2 no longer prints out the affected user metadata that might contain the HTTP session ID.

Additionally, we also redact values of further authentication-related HTTP headers in addition to Cookie on this page as a hardening.

Affected software

Click a technology to see all vulnerabilities affecting it.

PlatformPackageVulnerable versionsFixed in
Java / Kotlin (Maven) org.jenkins-ci.main:jenkins-core >= 2.205, < 2.219, < 2.204.2 2.219, 2.204.2

References

CVSS score 5.4/10
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Weakness (CWE)
CWE-200
Platform
Java / Kotlin (Maven)
Package
org.jenkins-ci.main:jenkins-core
Disclosed
24.05.2022
Updated
11.10.2026 11:21

Sources and licenses

OSV / GitHub Advisory Database - GHSA-4jjj-cm7q-v6hr - CC BY 4.0

Vulnerability history: org.jenkins-ci.main:jenkins-core

All published vulnerabilities of this package (Java / Kotlin (Maven)), newest first. Shows whether this is a one-off slip or a package that needs watching.

All (259) in the archive
Total entries
259
First → latest
01.2022 06.2026
Without a fix
1
Exploited in attacks
4

Severity breakdown

  • Critical 19
  • High 62
  • Medium 158
  • Low 20

Disclosures per year

Severity:
  1. Jenkins Diagnostic page exposed session cookies this entry
    Medium · 5.4 CVE-2020-2103 >= 2.205, < 2.219, < 2.204.2 2.219, 2.204.2
  2. Jenkins arbitrary type deserialization from attacker-controlled config.xml allows remote code execution and user impersonation
    High · 8.8 CVE-2026-53435 < 2.555.3, >= 2.556, < 2.568 2.555.3, 2.568
  3. Jenkins: Stored XSS vulnerability in node offline cause description
    High · 8.0 CVE-2026-53441 >= 2.483, < 2.568 2.568
  4. Jenkins has a link following vulnerability allows arbitrary file creation
    High · 8.8 CVE-2026-33001 < 2.555 2.555
  5. Jenkins has a DNS rebinding vulnerability in WebSocket CLI origin validation
    High · 7.5 CVE-2026-33002 >= 2.442, < 2.555 2.555
  6. Jenkins has a stored XSS vulnerability in node offline cause description
    High · 8.0 CVE-2026-27099 >= 2.542, < 2.551, >= 2.483, < 2.541.2 2.551, 2.541.2
  7. Jenkins has a Denial of service vulnerability in HTTP-based CLI
    High · 7.5 CVE-2025-67635 >= 2.529, < 2.541, < 2.528.3 2.541, 2.528.3
  8. Jenkins Remoting library arbitrary file read vulnerability
    High · 9.0 CVE-2024-43044 < 2.452.4, >= 2.460, < 2.462.1, >= 2.470, < 2.471 2.452.4, 2.462.1, 2.471
  9. Arbitrary file read vulnerability through the Jenkins CLI can lead to RCE
    Critical · 9.8 Exploited in attacks CVE-2024-23897 >= 1.606, < 2.426.3, >= 2.427, < 2.440.1, >= 2.441, < 2.442 2.426.3, 2.440.1, 2.442
  10. Cross-site WebSocket hijacking vulnerability in the Jenkins CLI
    High · 8.8 CVE-2024-23898 >= 2.217, < 2.426.3, >= 2.427, < 2.442, = 2.441 2.426.3, 2.442
  11. Jenkins temporary plugin file created with insecure permissions
    High · 7.0 CVE-2023-43496 >= 2.50, < 2.414.2, >= 2.415, < 2.424 2.414.2, 2.424
  12. Jenkins Cross-site Scripting vulnerability
    High · 8.0 CVE-2023-43495 >= 2.50, < 2.414.2, >= 2.415, < 2.424 2.414.2, 2.424
  13. Jenkins Stored Cross-site Scripting vulnerability
    High · 8.0 CVE-2023-39151 >= 2.402, < 2.414.1, < 2.401.3, >= 2.415, < 2.416 2.414.1, 2.401.3, 2.416
  14. Jenkins CSRF protection bypass vulnerability
    High · 8.0 CVE-2023-35141 < 2.400 2.400
  15. Cross-site Scripting vulnerability in Jenkins
    High · 8.8 CVE-2023-27898 >= 2.376, < 2.394, < 2.375.4 2.394, 2.375.4
  16. Incorrect Authorization in Jenkins Core
    High · 7.0 CVE-2023-27899 >= 2.376, < 2.387.1, < 2.375.4, >= 2.388, < 2.394 2.387.1, 2.375.4, 2.394
  17. Denial of service in Jenkins Core
    High · 7.5 CVE-2023-27901 >= 2.388, < 2.394, < 2.375.4, >= 2.376, < 2.387.1 2.394, 2.375.4, 2.387.1
  18. Jenkins vulnerable to stored cross site scripting in the I:helpIcon component
    High · 8.0 CVE-2022-41224 >= 2.367, < 2.370 2.370
  19. Cross-site Scripting vulnerability in Jenkins
    High · 8.0 CVE-2022-34170 >= 2.350, < 2.356, >= 2.320, < 2.332.4, >= 2.346, < 2.346.1 2.356, 2.332.4, 2.346.1
  20. Unauthorized view fragment access in Jenkins
    High · 7.5 CVE-2022-34175 >= 2.335, < 2.356 2.356
  21. Cross-site Scripting vulnerability in Jenkins
    High · 8.0 CVE-2022-34173 >= 2.340, < 2.356 2.356
  22. Cross-site Scripting vulnerability in Jenkins
    High · 8.0 CVE-2022-34172 >= 2.340, < 2.356, >= 2.332, < 2.332.4 2.356, 2.332.4
  23. Cross-site Scripting vulnerability in Jenkins
    High · 8.0 CVE-2022-34171 >= 2.350, < 2.356, >= 2.346, < 2.346.1, < 2.332.4 2.356, 2.346.1, 2.332.4
  24. Multiple vulnerabilities allow bypassing path filtering of agent-to-controller access control in Jenkins
    Critical · 9.0 CVE-2021-21686 < 2.303.3, >= 2.304, < 2.319 2.303.3, 2.319
  25. Multiple vulnerabilities allow bypassing path filtering of agent-to-controller access control in Jenkins
    Critical · 9.0 CVE-2021-21685 < 2.303.3, >= 2.304, < 2.319 2.303.3, 2.319
  26. Multiple vulnerabilities allow bypassing path filtering of agent-to-controller access control in Jenkins
    Critical · 9.0 CVE-2021-21689 < 2.303.3, >= 2.304, < 2.319 2.303.3, 2.319
  27. Multiple vulnerabilities allow bypassing path filtering of agent-to-controller access control in Jenkins
    Critical · 9.0 CVE-2021-21690 < 2.303.3, >= 2.304, < 2.319 2.303.3, 2.319
  28. Multiple vulnerabilities allow bypassing path filtering of agent-to-controller access control in Jenkins
    Critical · 9.0 CVE-2021-21692 < 2.303.3, >= 2.304, < 2.319 2.303.3, 2.319
  29. Multiple vulnerabilities allow bypassing path filtering of agent-to-controller access control in Jenkins
    Critical · 9.0 CVE-2021-21693 < 2.303.3, >= 2.304, < 2.319 2.303.3, 2.319
  30. Multiple vulnerabilities allow bypassing path filtering of agent-to-controller access control in Jenkins
    Critical · 9.0 CVE-2021-21694 < 2.303.3, >= 2.304, < 2.319 2.303.3, 2.319
  31. Multiple vulnerabilities allow bypassing path filtering of agent-to-controller access control in Jenkins
    Critical · 9.0 CVE-2021-21688 < 2.303.3, >= 2.304, < 2.319 2.303.3, 2.319
  32. Multiple vulnerabilities allow bypassing path filtering of agent-to-controller access control in Jenkins
    Critical · 9.0 CVE-2021-21691 < 2.303.3, >= 2.304, < 2.319 2.303.3, 2.319
  33. Multiple vulnerabilities allow bypassing path filtering of agent-to-controller access control in Jenkins
    Critical · 9.0 CVE-2021-21687 < 2.303.3, >= 2.304, < 2.319 2.303.3, 2.319
  34. Agent-to-controller access control allowed writing to sensitive directory used by Jenkins Pipeline: Shared Groovy Libraries Plugin
    High · 8.8 CVE-2021-21696 < 2.303.3, >= 2.304, < 2.319 2.303.3, 2.319
  35. Agent-to-controller access control allows reading/writing most content of build directories in Jenkins
    Critical · 9.1 CVE-2021-21697 < 2.303.3, >= 2.304, < 2.319 2.303.3, 2.319
  36. Multiple vulnerabilities allow bypassing path filtering of agent-to-controller access control in Jenkins
    Critical · 9.0 CVE-2021-21695 < 2.303.3, >= 2.304, < 2.319 2.303.3, 2.319
  37. Session fixation vulnerability in Jenkins
    High · 7.5 CVE-2021-21671 >= 2.292, < 2.300, < 2.289.2 2.300, 2.289.2
  38. Path traversal vulnerability in Jenkins agent names
    High · 8.0 CVE-2021-21605 < 2.263.2, >= 2.264, < 2.275 2.263.2, 2.275
  39. Improper handling of REST API XML deserialization errors in Jenkins
    High · 8.0 CVE-2021-21604 < 2.263.2, >= 2.264, < 2.275 2.263.2, 2.275
  40. Jenkins Cross-site Scripting vulnerability in project naming strategy
    High · 8.0 CVE-2020-2230 < 2.235.4, >= 2.236, < 2.252 2.235.4, 2.252
  41. Jenkins Cross-Site Scripting vulnerability in help icons
    High · 8.0 CVE-2020-2229 < 2.235.4, >= 2.236, < 2.252 2.235.4, 2.252
Show more (20) Showing 41 of 82

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