XSS in Lxml
CVE-2020-27783
A XSS vulnerability was discovered in python-lxml's clean module. The module's parser didn't properly imitate browsers, which caused different behaviors between the sanitizer and the user's page. A remote attacker could exploit this flaw t…
Vulnerability class: XSS (Cross-Site Scripting)
EPSS: 0.039 (89.2th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.
Affected products
- Lxml
- Netapp Snapcenter
- Oracle Communications_offline_mediation_controller — versions 12.0.0.3.0
- Oracle Zfs_storage_appliance_kit — versions 8.8
- Debian Debian_linux — versions 9.0, 10.0
- Fedoraproject Fedora — versions 32, 33
- Redhat Enterprise_linux — versions 8.0
- Redhat Software_collections
- N/a Python-lxml — versions lxml-4.6.2
Weakness classification (CWE)
Public proof-of-concept exploits
References
- secalert@redhat.com (Exploit, Patch, Third Party Advisory, x_refsource_MISC, Issue Tracking)
- secalert@redhat.com (vendor-advisory, Third Party Advisory, x_refsource_DEBIAN)
- secalert@redhat.com (mailing-list, x_refsource_MLIST, Mailing List, Third Party Advisory)
- secalert@redhat.com (x_refsource_FEDORA, vendor-advisory)
- secalert@redhat.com (x_refsource_FEDORA, vendor-advisory)
- secalert@redhat.com (Patch, Third Party Advisory, x_refsource_MISC)
- secalert@redhat.com (Exploit, Third Party Advisory, x_refsource_MISC)
- secalert@redhat.com (x_refsource_CONFIRM, Third Party Advisory)
Frequently asked questions
- What is CVE-2020-27783?
- CVE-2020-27783 is a medium-severity vulnerability in Lxml, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2020-12-03.
- How severe is CVE-2020-27783?
- Medium severity. CVSS v3 base score is 6.1 out of 10.
- Is CVE-2020-27783 known to be exploited?
- 5 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.