Mozilla Bleach up to 3.11 cross site scripting

CVSS Meta Temp Score
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CTI Interest Score
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5.1$0-$5k0.00

Summaryinfo

A vulnerability was found in Mozilla Bleach up to 3.11 and classified as problematic. Affected by this vulnerability is an unknown functionality. Such manipulation leads to cross site scripting. This vulnerability is referenced as CVE-2020-6816. It is possible to launch the attack remotely. No exploit is available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in Mozilla Bleach up to 3.11 (Web Browser) and classified as problematic. Affected by this issue is an unknown code. The manipulation with an unknown input leads to a cross site scripting vulnerability. Using CWE to declare the problem leads to 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. Impacted is integrity. CVE summarizes:

In Mozilla Bleach before 3.12, a mutation XSS in bleach.clean when RCDATA and either svg or math tags are whitelisted and the keyword argument strip=False.

The weakness was published 03/24/2020. This vulnerability is handled as CVE-2020-6816 since 01/10/2020. The attack may be launched remotely. No form of authentication is required for exploitation. Successful exploitation requires user interaction by the victim. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1059.007.

The vulnerability scanner Nessus provides a plugin with the ID 301534 (Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS : Bleach vulnerabilities (USN-8077-1)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 3.12 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (301534). Similar entry is available at VDB-152239. VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

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Version

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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: 🔍

NVD Base Score: 🔍

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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Nessus ID: 301534
Nessus Name: Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS : Bleach vulnerabilities (USN-8077-1)

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Bleach 3.12

Timelineinfo

01/10/2020 🔍
03/24/2020 +74 days 🔍
03/25/2020 +1 days 🔍
03/10/2026 +2176 days 🔍

Sourcesinfo

Vendor: mozilla.org
Product: github.com

Advisory: GHSA-m6xf-fq7q-8743
Status: Confirmed

CVE: CVE-2020-6816 (🔍)
GCVE (CVE): GCVE-0-2020-6816
GCVE (VulDB): GCVE-100-152240
See also: 🔍

Entryinfo

Created: 03/25/2020 11:04
Updated: 03/10/2026 11:55
Changes: 03/25/2020 11:04 (37), 03/25/2020 11:09 (18), 05/11/2024 11:50 (19), 05/11/2024 11:58 (2), 05/10/2025 13:18 (5), 03/10/2026 11:55 (2)
Complete: 🔍
Cache ID: 216::103

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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