Mozilla Bleach 3.1.4 bleach.clean cross site scripting

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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5.1$0-$5k0.00

Summaryinfo

A vulnerability described as problematic has been identified in Mozilla Bleach. Affected by this vulnerability is the function bleach.clean. The manipulation results in cross site scripting. This vulnerability is cataloged as CVE-2021-23980. The attack may be launched remotely. There is no exploit available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability, which was classified as problematic, was found in Mozilla Bleach (Web Browser). Affected is the function bleach.clean. The manipulation with an unknown input leads to a cross site scripting vulnerability. CWE is classifying the issue as CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. This is going to have an impact on integrity. CVE summarizes:

A mutation XSS affects users calling bleach.clean with all of: svg or math in the allowed tags p or br in allowed tags style, title, noscript, script, textarea, noframes, iframe, or xmp in allowed tags the keyword argument strip_comments=False Note: none of the above tags are in the default allowed tags and strip_comments defaults to True.

The weakness was shared 12/07/2022 as SNYK-PYTHON-BLEACH-1069893. The advisory is available at security.snyk.io. This vulnerability is traded as CVE-2021-23980 since 01/13/2021. Successful exploitation requires user interaction by the victim. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1059.007 by the MITRE ATT&CK project.

Upgrading to version 3.3.0 eliminates this vulnerability. Applying the patch 79b7a3c5e56a09d1d323a5006afa59b56162eb13 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

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Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.2
VulDB Meta Temp Score: 5.1

VulDB Base Score: 4.3
VulDB Temp Score: 4.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 6.1
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Cross site scripting
CWE: CWE-79 / CWE-94 / CWE-74
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Bleach 3.3.0
Patch: 79b7a3c5e56a09d1d323a5006afa59b56162eb13

Timelineinfo

01/13/2021 🔍
12/07/2022 +693 days 🔍
12/07/2022 +0 days 🔍
03/19/2025 +833 days 🔍

Sourcesinfo

Vendor: mozilla.org
Product: github.com

Advisory: SNYK-PYTHON-BLEACH-1069893
Status: Confirmed

CVE: CVE-2021-23980 (🔍)
GCVE (CVE): GCVE-0-2021-23980
GCVE (VulDB): GCVE-100-215094

Entryinfo

Created: 12/07/2022 21:23
Updated: 03/19/2025 18:43
Changes: 12/07/2022 21:23 (42), 03/19/2025 18:43 (29)
Complete: 🔍
Cache ID: 216::103

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