Vulnerability · Published Oct 1, 2020 · Assigned by mozilla
CVE-2020-15676
Medium 6.1
In plain English
A medium-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 1.6% (higher than 76% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS NVD)6.1Medium
Exploit odds (30 days)1.6%top 24.2% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official description
Firefox sometimes ran the onload handler for SVG elements that the DOM sanitizer decided to remove, resulting in JavaScript being executed after pasting attacker-controlled data into a contenteditable element. This vulnerability affects Firefox < 81, Thunderbird < 78.3, and Firefox ESR < 78.3.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine:v3.20 | firefox | 81.0-r0 | ALPINE-CVE-2020-15676 |
| Alpine:v3.21 | firefox | 81.0-r0 | ALPINE-CVE-2020-15676 |
| Alpine:v3.22 | firefox | 81.0-r0 | ALPINE-CVE-2020-15676 |
| Alpine:v3.23 | firefox | 81.0-r0 | ALPINE-CVE-2020-15676 |
| Alpine:v3.20 | firefox-esr | 78.3.0-r0 | ALPINE-CVE-2020-15676 |
| Alpine:v3.21 | firefox-esr | 78.3.0-r0 | ALPINE-CVE-2020-15676 |
| Alpine:v3.22 | firefox-esr | 78.3.0-r0 | ALPINE-CVE-2020-15676 |
| Alpine:v3.23 | firefox-esr | 78.3.0-r0 | ALPINE-CVE-2020-15676 |
| Alpine:v3.21 | librewolf | 81.0-r0 | ALPINE-CVE-2020-15676 |
| Alpine:v3.22 | librewolf | 81.0-r0 | ALPINE-CVE-2020-15676 |
| Alpine:v3.23 | librewolf | 81.0-r0 | ALPINE-CVE-2020-15676 |
| Alpine:v3.24 | librewolf | 81.0-r0 | ALPINE-CVE-2020-15676 |
| Debian:12 | firefox-esr | 78.3.0esr-1 | DEBIAN-CVE-2020-15676 |
| Debian:13 | firefox-esr | 78.3.0esr-1 | DEBIAN-CVE-2020-15676 |
| Debian:14 | firefox-esr | 78.3.0esr-1 | DEBIAN-CVE-2020-15676 |
| Debian:12 | thunderbird | 1:78.3.1-1 | DEBIAN-CVE-2020-15676 |
| Debian:13 | thunderbird | 1:78.3.1-1 | DEBIAN-CVE-2020-15676 |
| Debian:14 | thunderbird | 1:78.3.1-1 | DEBIAN-CVE-2020-15676 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Mozilla | Firefox | unspecified – before 81 |
| Mozilla | Thunderbird | unspecified – before 78.3 |
| Mozilla | Firefox ESR | unspecified – before 78.3 |
References
- https://www.mozilla.org/security/advisories/mfsa2020-43/ x_refsource_MISC
- https://www.mozilla.org/security/advisories/mfsa2020-44/ x_refsource_MISC
- https://www.mozilla.org/security/advisories/mfsa2020-42/ x_refsource_MISC
- https://bugzilla.mozilla.org/show_bug.cgi?id=1646140 x_refsource_MISC
- DSA-4770 vendor-advisory, x_refsource_DEBIAN
- [debian-lts-announce] 20201016 [SECURITY] [DLA 2408-1] thunderbird security update mailing-list, x_refsource_MLIST
- GLSA-202010-02 vendor-advisory, x_refsource_GENTOO
- openSUSE-SU-2020:1780 vendor-advisory, x_refsource_SUSE
- openSUSE-SU-2020:1785 vendor-advisory, x_refsource_SUSE