Security readout for executives and security teams
Plain-English summary
Older Jenkins versions allowed account names containing control characters. A malicious or careless signup could make one user appear to have another user's name, creating identity confusion and an account that cannot be removed through the UI.
Executive priority
Treat this as a moderate hygiene and identity-integrity issue. It is unlikely to be the top emergency without exploitation evidence, but exposed Jenkins systems should be corrected because account confusion can undermine administration and auditability.
Technical view
CVE-2018-1000193 affects Jenkins 2.120 and older and LTS 2.107.2 and older in HudsonPrivateSecurityRealm.java. The issue is improper neutralization of control sequences in usernames during signup, enabling visually confusing usernames and UI deletion failure.
Likely exposure
Exposure is most relevant for Jenkins instances at or below the affected versions, especially where users can sign up through Jenkins' private security realm. The provided bundle does not identify affected downstream products beyond Jenkins.
Exploitation context
The source bundle does not report active exploitation, and KEV is false. Evidence supports an account-name confusion and management-impact issue, not remote code execution or privilege escalation.
Researcher notes
The evidence is limited to the CVE description and vendor references. Validate version exposure, signup configuration, and account records. Do not assume broader product impact, exploitation, or a specific fix beyond Jenkins advisory guidance.
Mitigation direction
- Inventory Jenkins controllers and record exact core and LTS versions.
- Check the Jenkins advisory for the vendor-designated fixed release or workaround.
- Prioritize remediation for instances allowing user self-signup.
- Review accounts for unusual or visually confusing usernames.
- If UI deletion fails, follow Jenkins vendor guidance for safe cleanup.
Validation and detection
- Confirm whether any Jenkins instance runs 2.120 or older.
- Confirm whether any Jenkins LTS instance runs 2.107.2 or older.
- Review configured security realm and user signup settings.
- Inspect user lists for names containing control characters or suspicious lookalikes.
- Document any affected instances and remediation status.
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-2018-1000193 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://www.oracle.com/security-alerts/cpuapr2022.htmlCVE reference · x_refsource_MISC
- https://jenkins.io/security/advisory/2018-05-09/#SECURITY-786CVE 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.