Vulnerability Name:

CVE-2020-6816 (CCN-178671)

Assigned:2020-03-17
Published:2020-03-17
Updated:2022-10-06
Summary: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.
CVSS v3 Severity:6.1 Medium (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N)
5.8 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N/E:H/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): Required
Scope:Scope (S): Changed
Impact Metrics:Confidentiality (C): Low
Integrity (I): Low
Availibility (A): None
6.1 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N)
5.8 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N/E:H/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): Required
Scope:Scope (S): Changed
Impact Metrics:Confidentiality (C): Low
Integrity (I): Low
Availibility (A): None
CVSS v2 Severity:4.3 Medium (CVSS v2 Vector: AV:N/AC:M/Au:N/C:N/I:P/A:N)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Medium
Authentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): Partial
Availibility (A): None
5.5 Medium (CCN CVSS v2 Vector: AV:N/AC:L/Au:S/C:P/I:P/A:N)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Athentication (Au): Single_Instance
Impact Metrics:Confidentiality (C): Partial
Integrity (I): Partial
Availibility (A): None
Vulnerability Type:CWE-79
Vulnerability Consequences:Cross-Site Scripting
References:Source: MITRE
Type: CNA
CVE-2020-6816

Source: MISC
Type: Exploit, Third Party Advisory
https://advisory.checkmarx.net/advisory/CX-2020-4277

Source: XF
Type: UNKNOWN
mozilla-bleach-cve20206816-xss(178671)

Source: CCN
Type: Bleach GIT Repository
mutation XSS via whitelisted math or svg and raw tag

Source: MISC
Type: Third Party Advisory
https://github.com/mozilla/bleach/security/advisories/GHSA-m6xf-fq7q-8743

Source: FEDORA
Type: Mailing List, Third Party Advisory
FEDORA-2020-e0f35d634c

Source: MISC
Type: Exploit, Third Party Advisory
https://www.checkmarx.com/blog/vulnerabilities-discovered-in-mozilla-bleach

Source: CCN
Type: IBM Security Bulletin 6211861 (PowerAI)
A security vulnerability has been identified in Bleach shipped with IBM Watson Machine Learning Community Edition (WMLCE)

Source: CCN
Type: WhiteSource Vulnerability Database
CVE-2020-6816

Vulnerable Configuration:Configuration 1:
  • cpe:/a:mozilla:bleach:*:*:*:*:*:*:*:* (Version < 3.1.2)

    • Configuration 2:
  • cpe:/o:fedoraproject:fedora:33:*:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    Oval Definitions
    Definition IDClassTitleLast Modified
    oval:org.opensuse.security:def:113256
    P
    		python36-bleach-3.3.0-1.4 on GA media (Moderate)
    2022-01-17
    oval:org.opensuse.security:def:106668
    P
    		python36-bleach-3.3.0-1.4 on GA media (Moderate)
    2021-10-01
    oval:org.opensuse.security:def:11198
    P
    		Security update for python-bleach (Important)
    2021-04-18
    oval:org.opensuse.security:def:96466
    P
    		Security update for python-bleach (Important)
    2021-04-18
    oval:org.opensuse.security:def:103156
    P
    		Security update for python-bleach (Important)
    2021-04-18
    oval:org.opensuse.security:def:109813
    P
    		Security update for python-bleach (Important)
    2021-04-18
    oval:org.opensuse.security:def:111320
    P
    		Security update for python-bleach (Important)
    2021-04-14
    BACK
    mozilla bleach *
    fedoraproject fedora 33