Security readout for executives and security teams
Plain-English summary
This issue affects older Jenkins S3 Plugin installations. An attacker who can influence uploaded file names could place JavaScript in a name, causing that script to run in another user’s browser during certain Jenkins UI interactions. The main business risk is browser-side compromise of Jenkins users, potentially including privileged users.
Executive priority
Treat as a targeted Jenkins hygiene issue. It is not documented here as actively exploited, but Jenkins often holds sensitive build and deployment access, so exposed instances should be checked promptly.
Technical view
CVE-2018-1000177 is a cross-site scripting flaw in Jenkins S3 Plugin 0.10.12 and older, in jobMain.jelly. The vulnerable path handles uploaded file names unsafely, allowing JavaScript embedded in file names to execute in another user’s browser when specific UI actions occur.
Likely exposure
Exposure is most likely on Jenkins servers running S3 Plugin 0.10.12 or older, especially where builds, users, or integrations can create uploaded files with attacker-controlled names.
Exploitation context
The source bundle does not indicate active exploitation or KEV listing. Exploitation requires control over uploaded file names and a separate user interacting with affected Jenkins UI elements.
Researcher notes
The evidence identifies the vulnerable plugin, version range, file path, attacker prerequisite, and browser-execution condition. The bundle does not provide CVSS, CWE, exploit status, or a specific fixed version.
Mitigation direction
- Inventory Jenkins S3 Plugin versions across all Jenkins controllers.
- Check the Jenkins advisory for the vendor-confirmed fixed version or remediation.
- Update, disable, or remove the plugin according to Jenkins guidance.
- Restrict who can submit builds or artifacts with arbitrary file names.
- Review Jenkins permissions for users who can influence uploaded artifacts.
Validation and detection
- Confirm whether Jenkins S3 Plugin is installed.
- Verify whether the installed version is 0.10.12 or older.
- Identify jobs or integrations that upload files through the plugin.
- Review recent artifact names for suspicious script-like content.
- Confirm remediation against the Jenkins advisory before closing the finding.
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-2018-1000177 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/2018-04-16/CVE 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.