CVE-2020-28493
Medium
Description
This affects the package jinja2 from 0.0.0 and before 2.11.3. The ReDoS vulnerability is mainly due to the `_punctuation_re regex` operator and its use of multiple wildcards. The last wildcard is the most exploitable as it searches for trailing punctuation. This issue can be mitigated by Markdown to format user content instead of the urlize filter, or by implementing request timeouts and limiting process memory.
SeverityMedium
CVSS5.3
Exploit probability—
Product
Palletsprojects Jinja
PublishedFeb 1, 2021
First seenFeb 1, 2021
How to fix
Update
- palletsprojects jinja2.11.3 or later
- jinja22.11.3 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| palletsprojects jinja | v < 2.11.3 | 2.11.3 |
| fedoraproject fedora | 33 | — |
| jinja2PyPI | v < 2.11.3 | 2.11.3 |
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