CVE-2021-23980
python-bleach: Mutation cross-site scripting in bleach.clean
Severity Score
6.1
*CVSS v3.1
Exploit Likelihood
*EPSS
Affected Versions
*CPE
Public Exploits
1
*Multiple Sources
Exploited in Wild
-
*KEV
Decision
-
*SSVC
Descriptions
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.
*Credits:
N/A
CVSS Scores
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
* Common Vulnerability Scoring System
SSVC
- Decision:-
Exploitation
Automatable
Tech. Impact
* Organization's Worst-case Scenario
Timeline
- 2021-01-13 CVE Reserved
- 2021-04-28 CVE Published
- 2024-08-03 CVE Updated
- 2024-08-03 First Exploit
- 2024-09-08 EPSS Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
CWE
- CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CAPEC
References (4)
| URL | Tag | Source |
|---|
| URL | Date | SRC |
|---|---|---|
| https://bugzilla.mozilla.org/show_bug.cgi?id=CVE-2021-23980 | 2024-08-03 |
| URL | Date | SRC |
|---|
| URL | Date | SRC |
|---|---|---|
| https://github.com/mozilla/bleach/security/advisories/GHSA-vv2x-vrpj-qqpq | 2023-02-27 | |
| https://access.redhat.com/security/cve/CVE-2021-23980 | 2021-03-09 | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1925252 | 2021-03-09 |