CVE-2021-28957

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2021-28957
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.

6.1 /10

CVSS v3 : MEDIUM

V3 Legend

Vector :

Exploitability : 2.8 / Impact : 2.7

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact NONE

Scope CHANGED

4.3 /10

CVSS v2.0 : MEDIUM

V2 Legend

Vector : AV:N/AC:M/Au:N/C:N/I:P/A:N

Exploitability : 8.6 / Impact : 2.9

Access Vector NETWORK

Access Complexity MEDIUM

Authentication NONE

Confidentiality Impact NONE

Integrity Impact PARTIAL

Availability Impact NONE

References
Link Resource
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
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

Configuration 1 (hide)

cpe:2.3:a:lxml:lxml:*:*:*:*:*:*:*:*

Configuration 2 (hide)

OR cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*

Configuration 3 (hide)

OR cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*

Configuration 4 (hide)

cpe:2.3:a:netapp:snapcenter:-:*:*:*:*:*:*:*

Configuration 5 (hide)

cpe:2.3:a:oracle:zfs_storage_appliance_kit:8.8:*:*:*:*:*:*:*
History

21 Nov 2024, 06:00

Type Values Removed Values Added
References () https://bugs.launchpad.net/lxml/+bug/1888153 - Exploit, Issue Tracking, Third Party Advisory () https://bugs.launchpad.net/lxml/+bug/1888153 - Exploit, Issue Tracking, Third Party Advisory
References () https://github.com/lxml/lxml/commit/a5f9cb52079dc57477c460dbe6ba0f775e14a999 - Patch, Third Party Advisory () https://github.com/lxml/lxml/commit/a5f9cb52079dc57477c460dbe6ba0f775e14a999 - Patch, Third Party Advisory
References () https://github.com/lxml/lxml/pull/316/commits/10ec1b4e9f93713513a3264ed6158af22492f270 - Patch, Third Party Advisory () https://github.com/lxml/lxml/pull/316/commits/10ec1b4e9f93713513a3264ed6158af22492f270 - Patch, Third Party Advisory
References () https://lists.debian.org/debian-lts-announce/2021/03/msg00031.html - Mailing List, Third Party Advisory () https://lists.debian.org/debian-lts-announce/2021/03/msg00031.html - Mailing List, Third Party Advisory
References () 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/3C2R44VDUY7FJVMAVRZ2WY7XYL4SVN45/ -
References () https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XXN3QPWCTQVOGW4BMWV3AUUZZ4NRZNSQ/ - () https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XXN3QPWCTQVOGW4BMWV3AUUZZ4NRZNSQ/ -
References () https://security.gentoo.org/glsa/202208-06 - Third Party Advisory () https://security.gentoo.org/glsa/202208-06 - Third Party Advisory
References () https://security.netapp.com/advisory/ntap-20210521-0004/ - Third Party Advisory () https://security.netapp.com/advisory/ntap-20210521-0004/ - Third Party Advisory
References () https://www.debian.org/security/2021/dsa-4880 - Third Party Advisory () https://www.debian.org/security/2021/dsa-4880 - Third Party Advisory
References () https://www.oracle.com/security-alerts/cpuoct2021.html - Patch, Third Party Advisory () https://www.oracle.com/security-alerts/cpuoct2021.html - Patch, Third Party Advisory

10 Aug 2022, 20:15

Type Values Removed Values Added
References
  • (GENTOO) https://security.gentoo.org/glsa/202208-06 -

06 Dec 2021, 21:31

Type Values Removed Values Added
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:*:*:*:*:*:*:*
References (CONFIRM) https://security.netapp.com/advisory/ntap-20210521-0004/ - (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/ - (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 - (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/ - (FEDORA) https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/3C2R44VDUY7FJVMAVRZ2WY7XYL4SVN45/ - Mailing List, Third Party Advisory

20 Oct 2021, 11:16

Type Values Removed Values Added
References
  • (MISC) https://www.oracle.com/security-alerts/cpuoct2021.html -

04 Jun 2021, 04:15

Type Values Removed Values Added
References
  • (FEDORA) https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/XXN3QPWCTQVOGW4BMWV3AUUZZ4NRZNSQ/ -

28 May 2021, 03:15

Type Values Removed Values Added
References
  • (FEDORA) https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/3C2R44VDUY7FJVMAVRZ2WY7XYL4SVN45/ -

21 May 2021, 09:15

Type Values Removed Values Added
References
  • (CONFIRM) https://security.netapp.com/advisory/ntap-20210521-0004/ -
Information

Published : 2021-03-21 05:15

Updated : 2024-11-21 06:00

NVD link : CVE-2021-28957

Mitre link : CVE-2021-28957

CVE.ORG link : CVE-2021-28957

JSON object : View

Products Affected

fedoraproject

  • fedora

netapp

  • snapcenter

oracle

  • zfs_storage_appliance_kit

debian

  • debian_linux

lxml

  • lxml
CWE
CWE-79

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')