Vulnerability · Published Mar 25, 2020 · Assigned by mozilla
CVE-2020-6809
High 7.5
In plain English
A high-severity security flaw in Firefox from Mozilla. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.5% (higher than 74% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS NVD)7.5High
Exploit odds (30 days)1.5%top 25.9% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official description
When a Web Extension had the all-urls permission and made a fetch request with a mode set to 'same-origin', it was possible for the Web Extension to read local files. This vulnerability affects Firefox < 74.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine:v3.20 | firefox | 74.0-r0 | ALPINE-CVE-2020-6809 |
| Alpine:v3.21 | firefox | 74.0-r0 | ALPINE-CVE-2020-6809 |
| Alpine:v3.22 | firefox | 74.0-r0 | ALPINE-CVE-2020-6809 |
| Alpine:v3.23 | firefox | 74.0-r0 | ALPINE-CVE-2020-6809 |
| Alpine:v3.21 | librewolf | 74.0-r0 | ALPINE-CVE-2020-6809 |
| Alpine:v3.22 | librewolf | 74.0-r0 | ALPINE-CVE-2020-6809 |
| Alpine:v3.23 | librewolf | 74.0-r0 | ALPINE-CVE-2020-6809 |
| Alpine:v3.24 | librewolf | 74.0-r0 | ALPINE-CVE-2020-6809 |
Affected products (as reported)
References
- https://www.mozilla.org/security/advisories/mfsa2020-08/ x_refsource_MISC
- https://bugzilla.mozilla.org/show_bug.cgi?id=1420296 x_refsource_MISC