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python-lxml におけるクロスサイトスクリプティングの脆弱性
Title python-lxml におけるクロスサイトスクリプティングの脆弱性
Summary

python-lxml には、クロスサイトスクリプティングの脆弱性が存在します。

Possible impacts 情報を取得される、および情報を改ざんされる可能性があります。
Solution

ベンダより正式な対策が公開されています。ベンダ情報を参照して適切な対策を実施してください。

Publication Date March 20, 2021, midnight
Registration Date Nov. 25, 2021, 3:44 p.m.
Last Update Nov. 25, 2021, 3:44 p.m.
CVSS3.0 : 警告
Score 6.1
Vector CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
CVSS2.0 : 警告
Score 4.3
Vector AV:N/AC:M/Au:N/C:N/I:P/A:N
Affected System
Debian
Debian GNU/Linux 
lxml
lxml 4.6.3 未満
CVE (情報セキュリティ 共通脆弱性識別子)
CWE (共通脆弱性タイプ一覧)
ベンダー情報
Change Log
No Changed Details Date of change
1 [2021年11月25日]
  掲載		 Nov. 25, 2021, 3:44 p.m.
NVD Vulnerability Information
CVE-2021-28957
Summary

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.

Publication Date March 21, 2021, 2:15 p.m.
Registration Date March 21, 2021, 8:03 p.m.
Last Update Nov. 21, 2024, 3 p.m.
Affected software configurations
Configuration1 or higher or less more than less than
cpe:2.3:a:lxml:lxml:*:*:*:*:*:*:*:* 4.6.3
Configuration2 or higher or less more than less than
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
Configuration3 or higher or less more than less than
cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*
Configuration4 or higher or less more than less than
cpe:2.3:a:netapp:snapcenter:-:*:*:*:*:*:*:*
Configuration5 or higher or less more than less than
cpe:2.3:a:oracle:zfs_storage_appliance_kit:8.8:*:*:*:*:*:*:*
Related information, measures and tools
Common Vulnerabilities List