Cross-site scripting in Meta Nuclide
Priority MEDIUM 53CWE-79Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Cross-site scripting
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA and GitHub. Impact type from CWE-79.
Summary
The hhvm-attach deep link handler in Nuclide did not properly sanitize the provided hostname parameter when rendering. As a result, a malicious URL could be used to render HTML and other content inside of the editor's context, which could potentially be chained to lead to code execution. This issue affected Nuclide prior to v0.290.0.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.02332 83rd percentileScored 2026-11-07
Fix Fixed nuclide (npm): 0.290.0
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Meta | Nuclide | v0.290.0; up to v0.290.0 | — | No fix listed | CNA |
| — | nuclide (npm) | before 0.290.0 | 0.290.0 | Patch available | GHSA-r83x-wj75-v89r |
- Nuclide VendorMeta Affected v0.290.0; up to v0.290.0 Fixed in — No fix listed CNA
- nuclide (npm) Vendor— Affected before 0.290.0 Fixed in 0.290.0 Patch available GHSA-r83x-wj75-v89r
Remediation
- Fix · GHSA-r83x-wj75-v89r nuclide (npm) Fixed in 0.290.0 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2018-6333
- 2026-10-03 Alias added: GHSA-r83x-wj75-v89r
References
Sources
- CVE-2018-6333 · CVE Program
- CVE-2018-6333 · NVD
- FIRST EPSS
- GHSA-r83x-wj75-v89r · GitHub Advisory Database · CC BY 4.0
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