CVE-2020-6802

CWE-79 — Cross-site Scripting (XSS)11 documents7 sources
Severity
6.1MEDIUM
EPSS
0.3%
top 49.81%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
2
Mozilla BleachFedoraproject Fedora
Timeline
PublishedMar 24
Latest updateMar 5

Description

In Mozilla Bleach before 3.11, a mutation XSS affects users calling bleach.clean with noscript and a raw tag in the allowed/whitelisted tags option.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:NExploitability: 2.8 | Impact: 2.7

Affected Packages4 packages

▶NVDmozilla/bleach< 3.1.1
▶CVEListV5mozilla_bleach<=3.10
▶PyPIbleach< 3.1.1
▶Debianpython-bleach< 3.1.1-1+3

Also affects: Fedora 30, 31, 32

🔴Vulnerability Details

5
OSV
python-bleach vulnerabilities↗2026-03-05
▶
OSV
CVE-2020-6802: In Mozilla Bleach before 3↗2020-03-24
▶
CVEList
CVE-2020-6802: In Mozilla Bleach before 3↗2020-03-24
▶
OSV
XSS in Bleach when noscript and raw tag whitelisted↗2020-02-24
▶
GHSA
XSS in Bleach when noscript and raw tag whitelisted↗2020-02-24
▶

📋Vendor Advisories

2
Ubuntu
Bleach vulnerabilities↗2026-03-05
▶
Debian
CVE-2020-6802: python-bleach - In Mozilla Bleach before 3.11, a mutation XSS affects users calling bleach.clean...↗2020
▶

💬Community

3
Bugzilla
CVE-2020-6802 python-bleach: mutation XSS vulnerability↗2020-04-21
▶
Bugzilla
CVE-2020-6802 python-bleach: mutation XSS vulnerability [epel-all]↗2020-04-21
▶
Bugzilla
CVE-2020-6802 python-bleach: mutation XSS vulnerability [fedora-all]↗2020-04-21
▶
CVE-2020-6802 (MEDIUM CVSS 6.1) | In Mozilla Bleach before 3.11 | cvebase.io