# CVE-2020-6816: python3-bleach: In Mozilla Bleach before 3.12, a mutation XSS in bleach.clean when RCDATA and either svg or math tags are whitelisted...

CVE-2020-6816 is fixed in 2 products on 1 platform, first by python-bleach 2.1.2-1ubuntu0.1~esm1, released February 16, 2023. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2020-6816
- Priority: Routine
- CVSS: n/a (Medium)
- EPSS: 0.0134
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Mar 24, 2020

## 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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | python-bleach Ubuntu 18.04.6 LTS (bionic) | 2.1.2-1ubuntu0.1~esm1 | [python-bleach 2.1.2-1ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-python-bleach-2.1.2-1ubuntu0.1-esm1.md) | Feb 16, 2023 |
| Linux | python3-bleach Ubuntu 18.04.6 LTS (bionic) | 2.1.2-1ubuntu0.1~esm1 | [python3-bleach 2.1.2-1ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-python3-bleach-2.1.2-1ubuntu0.1-esm1.md) | Feb 16, 2023 |
| Linux | python3-bleach Ubuntu 20.04 LTS (focal) | 3.1.1-1ubuntu0.1~esm1 | [python3-bleach 3.1.1-1ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-python3-bleach-3.1.1-1ubuntu0.1-esm1.md) | Feb 16, 2023 |

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