CVE-2021-38497
MEDIUM
6.5
CVSS Score
Published: November 3, 2021 at 12:03 AM UTC
Updated: June 17, 2026 at 04:02 AM UTC
3 products affected across 1 vendorFirefoxThunderbirdFirefox ESR
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Severity
MEDIUM6.5
Exploit prediction
EPSS 0.6%
Description
Through use of reportValidity() and window.open(), a plain-text validation message could have been overlaid on another origin, leading to possible user confusion and spoofing attacks. This vulnerability affects Firefox < 93, Thunderbird < 91.2, and Firefox ESR < 91.2.
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
v < 93
Affected range stops below 93, so it looks safe — our inference, not a vendor statement
Affected range stops below 93.0, so it looks safe — our inference, not a vendor statement
v < 91.2
Affected range stops below 91.2, so it looks safe — our inference, not a vendor statement
v < 91.2
Affected range stops below 91.2, so it looks safe — our inference, not a vendor statement
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
References (4)
x_refsource_MISCPermissions RequiredVendor Advisory
Source: [email protected]
https://bugzilla.mozilla.org/show_bug.cgi?id=1726621x_refsource_MISCVendor Advisory
Source: [email protected]
https://www.mozilla.org/security/advisories/mfsa2021-43/x_refsource_MISCVendor Advisory
Source: [email protected]
https://www.mozilla.org/security/advisories/mfsa2021-45/x_refsource_MISCVendor Advisory
Source: [email protected]
https://www.mozilla.org/security/advisories/mfsa2021-47/CVSS
- Attack Vector
- NETWORK
- Complexity
- LOW
- Privileges
- NONE
- User Interaction
- REQUIRED
- Scope
- UNCHANGED
- Confidentiality
- NONE
- Integrity
- HIGH
- Availability
- NONE
Vector?
Quick Info
StatusMODIFIED
CWE
CWE-346
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