VDB
DEBIAN-CVE-2021-28957
DEBIAN-CVE-2021-28957
PUBLISHED
CVSS 6.099999904632568 MEDIUM
An XSS vulnerability was discovered in python-lxml's clean module versions before 4.6.3. When disabling the safe_attrs_only and forms arguments, the Cleaner class does not remove the formaction attribute allowing for JS to bypass the sanitizer. A remote attacker could exploit this flaw to run arbitrary JS code on users who interact with incorrectly sanitized HTML. This issue is patched in lxml 4.6.3.
Risk Scores
CVSS 3.1
6.099999904632568
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Debian:14 | lxml | 0 |
| Debian:12 | lxml | 0 |
| Debian:13 | lxml | 0 |
Timeline
- Mar 21, 2021 CVE Published
- Oct 23, 2026 CVE Updated