CVE-2021-20729: netgate pfsense_plus Cross-site Scripting
CVSS: 6.1v3.1MediumModified
Published 31-03-2022Last modified 03-08-2024
Vulnerability summary
CVE-2021-20729 is a medium (CVSS 6.1) Cross-site Scripting vulnerability in netgate pfsense_plus. EPSS estimates a 2.88% chance of exploitation in the next 30 days, higher than 86.6% of scored vulnerabilities.
CVSS score
6.1/10
010
Medium · v3.1 (NVD)EPSS score
2.88%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Timeline
- 31-03-2022PublishedVulnerability first disclosed.
- 03-08-2024Last modifiedVulnerability information updated.
Description
Cross-site scripting vulnerability in pfSense CE and pfSense Plus (pfSense CE software versions 2.5.2 and earlier, and pfSense Plus software versions 21.05 and earlier) allows a remote attacker to inject an arbitrary script via a malicious URL.
CVSS metrics
2 scores · 1 source · 2 versionsMedium 6.1Preferred score · NVD (NIST)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:NSourcesSingle source
Medium 4.3Preferred score · NVD (NIST)
AV:N/AC:M/Au:N/C:N/I:P/A:NSourcesSingle source
EPSS trend
Probability
2.88%
Chance of exploitation in the next 30 days
Percentile
87%
Versus all other CVEs
30-day change
0.00 pp
From 2.88% on 20-09-2026
20-09-202620-10-2026
EPSS score2.88%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Pfsense2 products
- pfsense≤ 2.5.2
- pfsense ce and pfsense pluspfSense CE software versions 2.5.2 and earlier, and pfSense Plus software versions 21.05 and earlier
Netgate1 product
- pfsense_plus≤ 21.05
2 vendors · 3 products