CVE-2021-42576: microco bluemonday
CVSS: 9.8v3.1CriticalModified
AliasesGHSA-x95h-979x-cf3jGO-2022-0588PYSEC-2021-849UBUNTU-CVE-2021-42576DEBIAN-CVE-2021-42576
Published 18-10-2021Last modified 04-08-2024
Vulnerability summary
CVE-2021-42576 is a critical (CVSS 9.8) vulnerability in microco bluemonday. EPSS estimates a 1.56% chance of exploitation in the next 30 days, higher than 74.9% of scored vulnerabilities. 1 public exploit is recorded.
CVSS score
9.8/10
010
Critical · v3.1 (NVD)EPSS score
1.56%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1reference
Timeline
- 18-10-2021PublishedVulnerability first disclosed.
- 04-08-2024Last modifiedVulnerability information updated.
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 metrics
8 scores · 5 sources · 3 versionsCritical 9.3Preferred score · OSV · Pypi (Ecosystem advisory) · calculated from vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:USourcesAll 2 agree
- OSV · GoEcosystem advisory · calculated9.3CriticalCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U
Critical 9.8Preferred score · NVD (NIST)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HSourcesAll 5 agree
- OSV · PypiEcosystem advisory · calculated9.8CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- OSV · UbuntuEcosystem advisory · calculated9.8CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- OSV · DebianEcosystem advisory · calculated9.8CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- OSV · GoEcosystem advisory · calculated9.8CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
High 7.5Preferred score · NVD (NIST)
AV:N/AC:L/Au:N/C:P/I:P/A:PSourcesSingle source
EPSS trend
Probability
1.56%
Chance of exploitation in the next 30 days
Percentile
75%
Versus all other CVEs
30-day change
0.00 pp
From 1.56% on 19-09-2026
19-09-202619-10-2026
EPSS score1.56%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
1 foundExploit Reference (docs.google.com)
Maturity: unknown
Weaknesses
CWE · root causeNo weakness data has been published for this record.
Affected systems
Debian1 product
- golang-github-microcosm-cc-bluemonday< 1.0.16-1
Github.com/microcosm-cc1 product
- bluemonday< 1.0.16
Microco1 product
- bluemonday< 1.0.16
PyPI1 product
- pybluemonday< 0.0.8
Python1 product
- pybluemonday< 0.0.8
Ubuntu1 product
- golang-github-microcosm-cc-bluemondayAll versions (No fix recorded)
6 vendors · 6 products
References
12 links- docs.google.com/document/d/11SoX296sMS0XoQiQbpxc5pNxSdbJKDJkm5BDv0zrX50/X Refsource MISCWEBREPORTExploitThird Party Advisory
