Critical severity · published Oct 18, 2021
CVE-2021-42576
The bluemonday sanitizer before 1.0.16 for Go, and before 0.0.8 for Python (in pybluemonday), does not properly enforce policies associated with the SELECT, STYLE, and OPTION…
9.8
CVSS
1.6%
EPSS
No
On KEV
Description
The bluemonday sanitizer before 1.0.16 for Go, and before 0.0.8 for Python (in pybluemonday), does not properly enforce policies associated with the SELECT, STYLE, and OPTION elements.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.6% · higher than 75% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
BL
Bluemonday · Microco
before 1.0.16 · source: NVD
PY
Pybluemonday · Python
before 0.0.8 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-42576
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-42576
Exploit
https://docs.google.com/document/d/11SoX296sMS0XoQiQbpxc5pNxSdbJKDJkm5BDv0zrX50/
More from Bluemonday
6.1
CVE-2021-29272
bluemonday before 1.0.5 allows XSS because certain Go lowercasing converts an uppercase Cyrillic character, defeating a protection mechanism against the "script" string