Universal Cross Site Scripting (UXSS) vulnerability in Vimium Extension 1.66 and earlier…
Priority MEDIUM 60CWE-79Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Cross-site scripting
- Confidentiality · integrity · availability
- Low · Low · None
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-79.
Summary
Universal Cross Site Scripting (UXSS) vulnerability in Vimium Extension 1.66 and earlier allows remote attackers to run arbitrary code via omnibar feature.
Why it matters now
Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00682 52nd percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- No
- Technical impact
- Partial
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 |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:vimium_project:vimium:*:*:*:*:*:*:*:* | up to 1.66 | Vulnerable | Vimium Project |
- cpe:2.3:a:vimium_project:vimium:*:*:*:*:*:*:*:* Versions up to 1.66 Vulnerable ·Vimium Project
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2021-37518
- 2026-10-03 Alias added: GHSA-7wx8-v5hr-wv3m
References
Sources
- CVE-2021-37518 · CVE Program
- CVE-2021-37518 · NVD
- FIRST EPSS
- GHSA-7wx8-v5hr-wv3m · GitHub Advisory Database · CC BY 4.0
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