CVE-2020-6817
High
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']}).
SeverityHigh
CVSS7.5
Exploit probability—
Product
Mozilla Bleach
PublishedFeb 16, 2023
First seenFeb 16, 2023
Weakness typeCWE-1333CWE-1333
How to fix
Update
- mozilla bleach3.1.4 or later
- bleach3.1.4 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| mozilla bleach | v < 3.1.4 | 3.1.4 |
| bleachPyPI | v < 3.1.4 | 3.1.4 |
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