Security readout for executives and security teams
Plain-English summary
This Jenkins issue lets someone who already has a valid remember-me cookie stay logged in after the remember-me feature is disabled. The key risk is continued access that administrators may believe they have turned off. The provided sources do not show active exploitation or a CVSS score.
Executive priority
Treat this as a moderate access-control issue. It is not supported as actively exploited in the supplied evidence, but Jenkins often protects build secrets and deployment paths, so affected systems should be upgraded through normal vulnerability management priority.
Technical view
CVE-2018-1999045 is an improper authentication flaw in Jenkins SecurityRealm.java and TokenBasedRememberMeServices2.java affecting Jenkins 2.137 and earlier, and 2.121.2 and earlier. The described condition allows valid remember-me cookies to continue authenticating users after the feature is disabled.
Likely exposure
Exposure is most likely on Jenkins controllers running the affected versions where remember-me cookies were issued before administrators disabled that feature.
Exploitation context
The source bundle says an attacker needs a valid cookie. KEV is false, and the provided sources do not document active exploitation, public exploit use, or broader exploit prerequisites.
Researcher notes
The affected range and behavior come from the CVE description and Jenkins advisory reference. The bundle lacks CVSS, CWE, fixed-version details, and exploitation evidence, so validation should stay tied to Jenkins advisory data and local session behavior.
Mitigation direction
- Identify Jenkins instances and compare versions against the affected ranges.
- Review the Jenkins 2018-08-15 advisory for vendor-stated fixes and upgrade guidance.
- Prioritize internet-accessible or shared Jenkins environments first.
- Restrict Jenkins access while remediation is being planned, where operationally feasible.
Validation and detection
- Inventory Jenkins controller versions across production and administrative networks.
- Confirm whether remember-me authentication was enabled on affected Jenkins instances.
- Review authentication logs for unexpected continued sessions after remember-me was disabled.
- Document remediation status against the Jenkins advisory, not inferred fixed versions.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CVE-2018-1999045 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://jenkins.io/security/advisory/2018-08-15/#SECURITY-996CVE reference · x_refsource_CONFIRM
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.