CVE-2021-38510: mozilla firefox
Vulnerability summary
CVE-2021-38510 is a high (CVSS 8.8) vulnerability in mozilla firefox. EPSS estimates a 1.03% chance of exploitation in the next 30 days, higher than 63.4% of scored vulnerabilities.
Advisory lineage
Upstream 0 · Downstream 10 · Related 10Timeline
- 08-12-2021PublishedVulnerability first disclosed.
- 04-08-2024Last modifiedVulnerability information updated.
Description
The executable file warning was not presented when downloading .inetloc files, which, due to a flaw in Mac OS, can run commands on a user's computer.*Note: This issue only affected Mac OS operating systems. Other operating systems are unaffected.*. This vulnerability affects Firefox < 94, Thunderbird < 91.3, and Firefox ESR < 91.3.
CVSS metrics
3 scores · 2 sources · 2 versions- OSV · UbuntuEcosystem advisory · calculated8.8HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
EPSS trend
Probability
1.03%
Chance of exploitation in the next 30 days
Percentile
63%
Versus all other CVEs
30-day change
+0.03 pp
From 1.00% on 21-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeNo weakness data has been published for this record.
Affected systems
Ubuntu4 products
- mozjs38All versions (No fix recorded)
- mozjs52All versions (No fix recorded)
- mozjs68All versions (No fix recorded)
- mozjs78All versions (No fix recorded)
Mozilla3 products
- firefox≥ unspecified, < 94 | < 94.0
- firefox_esr≥ unspecified, < 91.3 | < 91.3.0
- thunderbird≥ unspecified, < 91.3 | < 91.3.0
2 vendors · 7 products
References
8 links- bugzilla.mozilla.org/show_bug.cgi?id=1731779X Refsource MISCIssue TrackingPermissions RequiredVendor Advisory