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ubuntucveUbuntu.comUB:CVE-2021-28957
HistoryMar 21, 2021 - 12:00 a.m.

CVE-2021-28957

2021-03-2100:00:00
ubuntu.com
ubuntu.com
24
python-lxml
cve-2021-28957
xss vulnerability
cleaner class
arbitrary js code
html sanitizer
remote attacker
patched
unix

CVSS2

4.3

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

PARTIAL

Availability Impact

NONE

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

CVSS3

6.1

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

CHANGED

Confidentiality Impact

LOW

Integrity Impact

LOW

Availability Impact

NONE

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

EPSS

0.002

Percentile

61.6%

JSON

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.

Bugs

OSVersionArchitecturePackageVersionFilename
ubuntu18.04noarchlxml< 4.2.1-1ubuntu0.4UNKNOWN
ubuntu20.04noarchlxml< 4.5.0-1ubuntu0.3UNKNOWN
ubuntu20.10noarchlxml< 4.5.2-1ubuntu0.4UNKNOWN
ubuntu14.04noarchlxml< 3.3.3-1ubuntu0.2+esm3UNKNOWN
ubuntu16.04noarchlxml< 3.5.0-1ubuntu0.4UNKNOWN

Related

alpinelinux 1
prion 1
osv 15
openvas 23
nessus 47
github 1
rocky 4
debiancve 1
redhatcve 1
veracode 1
cbl_mariner 2
mageia 1
debian 3
amazon 1
cvelist 1
ubuntu 2
almalinux 4
redhat 6
fedora 2
cve 1
nvd 1
suse 2
photon 4
gentoo 1
oraclelinux 4
ibm 2
oracle 1
alpinelinux
alpinelinux
CVE-2021-28957
2021-03-21 05:15:13
prion
prion
Cross site scripting
2021-03-21 05:15:00
osv
osv
lxml - security update
2021-03-29 00:00:00
lxml vulnerability
2021-04-08 12:46:21
CVE-2021-28957
2021-03-21 05:15:13
openvas
openvas
Huawei EulerOS: Security Advisory for python-lxml (EulerOS-SA-2021-2483)
2021-09-24 00:00:00
Ubuntu: Security Advisory (USN-4896-2)
2022-08-26 00:00:00
Huawei EulerOS: Security Advisory for python-lxml (EulerOS-SA-2022-1141)
2022-02-13 00:00:00
nessus
nessus
EulerOS Virtualization 3.0.6.6 : python-lxml (EulerOS-SA-2022-1141)
2022-02-12 00:00:00
Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS : lxml vulnerability (USN-4896-1)
2021-03-30 00:00:00
EulerOS Virtualization 3.0.2.0 : python-lxml (EulerOS-SA-2021-2830)
2021-12-29 00:00:00
github
github
lxml vulnerable to Cross-Site Scripting
2021-03-22 16:53:53
rocky
rocky
python-lxml security update
2021-11-09 08:26:20
python39:3.9 and python39-devel:3.9 security update
2021-11-09 08:26:25
python27:2.7 security update
2021-11-09 08:24:39
debiancve
debiancve
CVE-2021-28957
2021-03-21 05:15:13
redhatcve
redhatcve
CVE-2021-28957
2021-03-22 10:58:48
veracode
veracode
Cross-site Scripting (XSS)
2021-03-22 05:25:18
cbl_mariner
cbl_mariner
CVE-2021-28957 affecting package python-lxml 4.2.4-7
2021-08-11 06:39:25
CVE-2021-28957 affecting package python-lxml for versions less than 4.8.0-1
2022-04-26 19:57:36
mageia
mageia
Updated python-lxml packages fix a security vulnerability
2021-06-14 00:32:39
debian
debian
[SECURITY] [DSA 4880-1] lxml security update
2021-03-29 16:20:53
[SECURITY] [DSA 4880-1] lxml security update
2021-03-29 16:20:53
[SECURITY] [DLA 2606-1] lxml security update
2021-03-24 18:10:42
amazon
amazon
Medium: python-lxml
2024-08-01 03:01:00
cvelist
cvelist
CVE-2021-28957
2021-03-21 04:39:35
ubuntu
ubuntu
lxml vulnerability
2021-04-08 00:00:00
lxml vulnerability
2021-03-30 00:00:00
almalinux
almalinux
Moderate: python-lxml security update
2021-11-09 08:26:20
Moderate: python39:3.9 and python39-devel:3.9 security update
2021-11-09 08:26:25
Moderate: python27:2.7 security update
2021-11-09 08:24:39
redhat
redhat
(RHSA-2021:4158) Moderate: python-lxml security update
2021-11-09 08:26:20
(RHSA-2021:4160) Moderate: python39:3.9 and python39-devel:3.9 security update
2021-11-09 08:26:25
(RHSA-2021:4151) Moderate: python27:2.7 security update
2021-11-09 08:24:39
fedora
fedora
[SECURITY] Fedora 33 Update: python-lxml-4.5.1-4.fc33
2021-06-04 01:03:49
[SECURITY] Fedora 34 Update: python-lxml-4.6.3-1.fc34
2021-05-28 01:01:22
cve
cve
CVE-2021-28957
2021-03-21 05:15:13
nvd
nvd
CVE-2021-28957
2021-03-21 05:15:13
suse
suse
Security update for python-lxml (moderate)
2022-11-01 00:00:00
Security update for python-lxml (important)
2022-03-10 00:00:00
photon
photon
Moderate Photon OS Security Update - PHSA-2021-0072
2021-07-28 00:00:00
Moderate Photon OS Security Update - PHSA-2021-4.0-0072
2021-07-29 00:00:00
Critical Photon OS Security Update - PHSA-2022-0406
2022-06-17 00:00:00
gentoo
gentoo
lxml: Multiple Vulnerabilities
2022-08-10 00:00:00
oraclelinux
oraclelinux
python39:3.9 and python39-devel:3.9 security update
2021-11-16 00:00:00
python27:2.7 security update
2021-11-16 00:00:00
python38:3.8 and python38-devel:3.8 security update
2021-11-16 00:00:00
ibm
ibm
Security Bulletin: IBM QRadar SIEM contains multiple vulnerabilities
2024-03-27 19:39:32
Security Bulletin: Cloud Pak for Security uses packages that are vulnerable to multiple CVEs
2023-03-08 18:05:21
oracle
oracle
Oracle Critical Patch Update Advisory - October 2021
2021-10-19 00:00:00

CVSS2

4.3

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

PARTIAL

Availability Impact

NONE

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

CVSS3

6.1

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

CHANGED

Confidentiality Impact

LOW

Integrity Impact

LOW

Availability Impact

NONE

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

EPSS

0.002

Percentile

61.6%

JSON
Related for UB:CVE-2021-28957
alpinelinux1prion1osv15openvas23nessus47github1rocky4debiancve1redhatcve1veracode1cbl_mariner2mageia1debian3amazon1cvelist1ubuntu2almalinux4redhat6fedora2cve1nvd1suse2photon4gentoo1oraclelinux4ibm2oracle1