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.
References
Link | Resource |
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https://bugs.launchpad.net/lxml/+bug/1888153 | Exploit Issue Tracking Third Party Advisory |
https://github.com/lxml/lxml/commit/a5f9cb52079dc57477c460dbe6ba0f775e14a999 | Patch Third Party Advisory |
https://github.com/lxml/lxml/pull/316/commits/10ec1b4e9f93713513a3264ed6158af22492f270 | Patch Third Party Advisory |
https://lists.debian.org/debian-lts-announce/2021/03/msg00031.html | Mailing List Third Party Advisory |
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3C2R44VDUY7FJVMAVRZ2WY7XYL4SVN45/ | |
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XXN3QPWCTQVOGW4BMWV3AUUZZ4NRZNSQ/ | |
https://security.gentoo.org/glsa/202208-06 | Third Party Advisory |
https://security.netapp.com/advisory/ntap-20210521-0004/ | Third Party Advisory |
https://www.debian.org/security/2021/dsa-4880 | Third Party Advisory |
https://www.oracle.com/security-alerts/cpuoct2021.html | Patch Third Party Advisory |
Configurations
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History
07 Nov 2023, 03:32
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Information
Published : 2021-03-21 05:15
Updated : 2024-02-28 18:08
NVD link : CVE-2021-28957
Mitre link : CVE-2021-28957
CVE.ORG link : CVE-2021-28957
JSON object : View
Products Affected
debian
- debian_linux
lxml
- lxml
netapp
- snapcenter
fedoraproject
- fedora
oracle
- zfs_storage_appliance_kit
CWE
CWE-79
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')