Yamcs 5.8.6 allows XSS (issue 2 of 2).
Priority LOW 25CWE-79Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Cross-site scripting
- Confidentiality · integrity · availability
- Low · Low · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA and GitHub. Impact type from CWE-79.
Summary
Yamcs 5.8.6 allows XSS (issue 2 of 2). It comes with a Bucket as its primary storage mechanism. Buckets allow for the upload of any file. There's a way to upload an HTML file containing arbitrary JavaScript and then navigate to it. Once the user opens the file, the browser will execute the arbitrary JavaScript.
Why it matters now
EPSS 0.00609 49th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed org.yamcs:yamcs (Maven): 5.8.7
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
| — | org.yamcs:yamcs (Maven) | before 5.8.7 | 5.8.7 | Patch available | GHSA-643f-hpcc-2gv8 |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
- org.yamcs:yamcs (Maven) Vendor— Affected before 5.8.7 Fixed in 5.8.7 Patch available GHSA-643f-hpcc-2gv8
Remediation
- Fix · GHSA-643f-hpcc-2gv8 org.yamcs:yamcs (Maven) Fixed in 5.8.7 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2023-45280
- 2026-10-03 Alias added: GHSA-643f-hpcc-2gv8
References
More Yamcs vulnerabilities
- TI-2026-34240 Yamcs: Remote Code Execution via Mission Database algorithm override CVSS 3.1CRITICAL 9.8
- TI-2026-32507 Yamcs: No Rate Limiting on Authentication Endpoint CVSS 3.1CRITICAL 9.8
- TI-2026-34277 Yamcs: Authenticated Remote Code Execution (RCE) via Jython Algorithm Code Injection CVSS 3.1CRITICAL 9.1
- TI-2026-32532 Yamcs: Server-Side Code Injection (RCE) via Janino Expression Engine in `JavaExprAlgorithmExecutionFactory` CVSS 3.1CRITICAL 9.1
- TI-2026-40093 Yamcs: Insecure Direct Object Reference (IDOR) in PacketsApi allows unprivileged users to dump all telemetry packets CVSS 3.1MEDIUM 4.3
- TI-2026-32506 Yamcs: Unauthorized user enumeration via IAM API endpoints CVSS 3.1MEDIUM 4.3
Sources
- CVE-2023-45280 · CVE Program
- CVE-2023-45280 · NVD
- FIRST EPSS
- GHSA-643f-hpcc-2gv8 · GitHub Advisory Database · CC BY 4.0
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