VDB
CVE-2020-6817
CVE-2020-6817
PUBLISHED
CVSS 7.5 HIGH
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']}).
EPSS 0.72% · 53.3th percentile
Risk Scores
CVSS 3.1
7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS Score
0.72%
53.3th percentile
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Ubuntu:18.04:LTS | python-bleach | 2.1.2-1, 2.0-1, 0 |
| Ubuntu:16.04:LTS | python-bleach | 1.4-1, 1.4.2-1, 0 |
| Ubuntu:20.04:LTS | python-bleach | 3.1.0-1, 3.1.0-2, 3.1.1-1 |
Timeline
- Mar 30, 2020 CVE Published
- Aug 23, 2021 CVE Updated
- Feb 17, 2023 EPSS Score
- Mar 7, 2023 EPSS Score
- Mar 29, 2023 EPSS Score
- May 9, 2023 EPSS Score
- Jun 18, 2023 EPSS Score
- Jul 29, 2023 EPSS Score
- Sep 7, 2023 EPSS Score
- Oct 18, 2023 EPSS Score
- Nov 27, 2023 EPSS Score
- Jan 7, 2024 EPSS Score
References
- https://github.com/mozilla/bleach/security/advisories/GHSA-vqhp-cxgc-6wmm third-party-advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=1623633 third-party-advisory
- https://www.cve.org/CVERecord?id=CVE-2020-6817 third-party-advisory
- https://ubuntu.com/security/CVE-2020-6817 advisory
- https://github.com/mozilla/bleach/commit/d6018f2539d271963c3e7f54f36ef11900363c69 fix
- https://github.com/mozilla/bleach/commit/6e74a5027b57055cdaeb040343d32934121392a7 fix