Home/CVE/A XSS vulnerability was discovered in python-lxml's clean module. The module's parser didn't properly imitate browsers,
CVE

CVE-2020-27783

A XSS vulnerability was discovered in python-lxml's clean module. The module's parser didn't properly imitate browsers,

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.

MEDIUM · CVSS 6.1 EPSS 0.01246
Schedule remediation
  • Public exploit or PoC is available
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
▤

Affected Products & Versions

8
lxml>= 1.2 and < 4.6.2
redhat software collectionsall versions
redhat enterprise linuxall versions
debian linuxall versions
fedoraproject fedoraall versions
netapp snapcenterall versions
oracle communications offline mediation controllerall versions
oracle zfs storage appliance kitall versions
▤

Affected Packages

1
Language-ecosystem packages (from OSV) tied to this CVE, with the version that fixes it - the dependency-level detail NVD doesn’t carry.
PyPI lxml MODERATE fixed in 4.6.2
⚠

Public Exploits & PoCs

2
pocadvisory.checkmarx.net · CX-2020-4286advisory.checkmarx.net
pocbugzilla.redhat.com · show_bug.cgi?id=1901633bugzilla.redhat.com
▣

Scoring & Timeline

6.1
MEDIUM · CVSS v3.1 · secalert@redhat.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD03 Dec 2020 · 05:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
SSVC triage · cisa-vulnrichment
Exploitation
none
Automatable
no
Technical impact
partial
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
⚑

Vendor Advisories

15
suse-csafopenSUSE-SU-2024:11236-1
suse-csafSUSE-SU-2022:3836-1
suse-csafSUSE-SU-2022:3460-1
suse-csafSUSE-SU-2022:3461-1
suse-csafSUSE-SU-2022:1729-1
🔗

References & Sources

6
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://lists.debian.org/debian-lts-announce/2020/12/msg00028.htmlMailing ListThird Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JKG67GPGTV23KADT4D4GK4RMHSO4CIQL/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TMHVKRUT22LVWNL3TB7HPSDHJT74Q3JK/
https://security.netapp.com/advisory/ntap-20210521-0003/Third Party Advisory
https://www.debian.org/security/2020/dsa-4810Third Party Advisory
https://www.oracle.com//security-alerts/cpujul2021.htmlPatchThird Party Advisory
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