CVE-2020-27783 — Cross-site Scripting in Lxml

CWE-79 — Cross-site Scripting10 documents8 sources
Severity
6.1MEDIUMNVD
EPSS
1.2%
top 20.68%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
6
LxmlDebian LinuxFedoraproject Fedora+3 more
Timeline
PublishedDec 3
Latest updateJan 7

Description

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 to run arbitrary HTML/JS code.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:NExploitability: 2.8 | Impact: 2.7

Affected Packages5 packages

▶NVDlxml/lxml1.2 — 4.6.2
▶PyPIlxml/lxml< 4.6.2
▶Debianlxml/lxml< 4.6.2-1+3

Also affects: Debian Linux 10.0, 9.0, Fedora 32, 33, Enterprise Linux 8.0

Patches

Patch: bugzilla.redhat.com ↗Patch: www.oracle.com ↗Patch: bugzilla.redhat.com ↗

🔴Vulnerability Details

4
OSV
lxml vulnerable to Cross-site Scripting↗2021-01-07
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GHSA
lxml vulnerable to Cross-site Scripting↗2021-01-07
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CVEList
CVE-2020-27783: A XSS vulnerability was discovered in python-lxml's clean module↗2020-12-03
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OSV
CVE-2020-27783: A XSS vulnerability was discovered in python-lxml's clean module↗2020-12-03
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📋Vendor Advisories

5
Ubuntu
lxml vulnerability↗2020-12-11
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Ubuntu
lxml vulnerability↗2020-12-09
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Microsoft
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 rem↗2020-12-08
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Red Hat
python-lxml: mXSS due to the use of improper parser↗2020-10-18
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Debian
CVE-2020-27783: lxml - A XSS vulnerability was discovered in python-lxml's clean module. The module's p...↗2020
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CVE-2020-27783 — Cross-site Scripting in Lxml | cvebase