Vulnerability · Published Mar 24, 2020 · Assigned by mozilla
CVE-2020-6816
Medium 6.1
In plain English
A medium-severity security flaw in Mozilla Bleach. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.3% (higher than 71% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS NVD)6.1Medium
Exploit odds (30 days)1.3%top 28.6% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official description
In Mozilla Bleach before 3.12, a mutation XSS in bleach.clean when RCDATA and either svg or math tags are whitelisted and the keyword argument strip=False.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine:v3.20 | py3-bleach | 3.1.2-r0 | ALPINE-CVE-2020-6816 |
| Alpine:v3.21 | py3-bleach | 3.1.2-r0 | ALPINE-CVE-2020-6816 |
| Alpine:v3.22 | py3-bleach | 3.1.2-r0 | ALPINE-CVE-2020-6816 |
| Alpine:v3.23 | py3-bleach | 3.1.2-r0 | ALPINE-CVE-2020-6816 |
| Alpine:v3.24 | py3-bleach | 3.1.2-r0 | ALPINE-CVE-2020-6816 |
| Debian:12 | python-bleach | 3.1.3-1 | DEBIAN-CVE-2020-6816 |
| Debian:13 | python-bleach | 3.1.3-1 | DEBIAN-CVE-2020-6816 |
| Debian:14 | python-bleach | 3.1.3-1 | DEBIAN-CVE-2020-6816 |
| PyPI | bleach | 3.1.2 | PYSEC-2020-28 |
| PyPI | bleach | 3.1.2 | GHSA-m6xf-fq7q-8743 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| n/a | Mozilla Bleach | <=3.11 |
References
- https://github.com/mozilla/bleach/security/advisories/GHSA-m6xf-fq7q-8743 x_refsource_MISC
- https://www.checkmarx.com/blog/vulnerabilities-discovered-in-mozilla-bleach x_refsource_MISC
- FEDORA-2020-e0f35d634c vendor-advisory, x_refsource_FEDORA
- https://advisory.checkmarx.net/advisory/CX-2020-4277 x_refsource_MISC