CVE-2021-4138
MEDIUM
5.3
CVSS Score
Published: May 2, 2022 at 10:08 PM UTC
Updated: June 17, 2026 at 04:19 AM UTC
1 product affected across 1 vendorGeckodriver
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Severity
MEDIUM5.3
Exploit prediction
EPSS 0.8%
Description
Improved Host header checks to reject requests not sent to a well-known local hostname or IP, or the server-specified hostname.
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
v < 0.30.0
Affected range stops below 0.30.0, so it looks safe — our inference, not a vendor statement
Remediation
No guide yetNo remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.
References (2)
x_refsource_MISCIssue TrackingPermissions RequiredThird Party Advisory
Source: [email protected]
https://bugzilla.mozilla.org/show_bug.cgi?id=1652612x_refsource_MISCRelease NotesThird Party Advisory
Source: [email protected]
https://github.com/mozilla/geckodriver/releases/tag/v0.30.0CVSS
- Attack Vector
- NETWORK
- Complexity
- LOW
- Privileges
- NONE
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality
- NONE
- Integrity
- LOW
- Availability
- NONE
Vector?
Quick Info
StatusMODIFIED
CWE
NVD-CWE-noinfo
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