CVE-2020-6817
python-bleach - security update
7.5
HIGH
CVSS 3.1
EPSS 0.58%
Description
bleach.clean behavior parsing style attributes could result in a regular expression denial of service (ReDoS). Calls to bleach.clean with an allowed tag with an allowed style attribute are vulnerable to ReDoS. For example, bleach.clean(..., attributes={'a': ['style']}).
How to fix CVE-2020-6817
To remediate CVE-2020-6817, upgrade the affected package to a fixed version below.
- —upgrade to 3.1.4-1 or later
- —upgrade to 1.4-1+deb8u1 or later
- —upgrade to 3.1.4 or later
- —upgrade to 3.1.4 or later
Is CVE-2020-6817 being exploited?
Low — EPSS is 0.6%, meaning exploitation activity has not been observed at scale.
Affected packages (4)
- from 0, < 3.1.4-1
- from 0, < 1.4-1+deb8u1
- from 0, < 3.1.4
- from 0, < 3.1.4
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 4.0 | — | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N |
| osv | CVSS 3.1 | HIGH7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |