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
10 Aug 2022, 20:15
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06 Dec 2021, 21:31
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CPE | cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:* cpe:2.3:a:netapp:snapcenter:-:*:*:*:*:*:*:* cpe:2.3:a:oracle:zfs_storage_appliance_kit:8.8:*:*:*:*:*:*:* cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:* |
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References | (CONFIRM) https://security.netapp.com/advisory/ntap-20210521-0004/ - Third Party Advisory | |
References | (FEDORA) https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/XXN3QPWCTQVOGW4BMWV3AUUZZ4NRZNSQ/ - Mailing List, Third Party Advisory | |
References | (MISC) https://www.oracle.com/security-alerts/cpuoct2021.html - Patch, Third Party Advisory | |
References | (FEDORA) https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/3C2R44VDUY7FJVMAVRZ2WY7XYL4SVN45/ - Mailing List, Third Party Advisory |
20 Oct 2021, 11:16
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04 Jun 2021, 04:15
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28 May 2021, 03:15
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21 May 2021, 09:15
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Information
Published : 2021-03-21 05:15
Updated : 2024-02-04 21:23
NVD link : CVE-2021-28957
Mitre link : CVE-2021-28957
CVE.ORG link : CVE-2021-28957
JSON object : View
Products Affected
oracle
- zfs_storage_appliance_kit
netapp
- snapcenter
fedoraproject
- fedora
lxml
- lxml
debian
- debian_linux
CWE
CWE-79
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')