CVE-2021-27933: pfsense Cross-site Scripting
CVSS: 6.1v3.1MediumModified
Published 28-04-2021Last modified 03-08-2024
Vulnerability summary
CVE-2021-27933 is a medium (CVSS 6.1) Cross-site Scripting vulnerability in pfsense. EPSS estimates a 26.61% chance of exploitation in the next 30 days, higher than 98% of scored vulnerabilities. 1 public exploit is recorded.
CVSS score
6.1/10
010
Medium · v3.1 (NVD)EPSS score
26.61%
0%100%
High · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1reference
Timeline
- 28-04-2021PublishedVulnerability first disclosed.
- 03-08-2024Last modifiedVulnerability information updated.
Description
pfSense 2.5.0 allows XSS via the services_wol_edit.php Description field.
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
26.61%
Chance of exploitation in the next 30 days
Percentile
98%
Versus all other CVEs
30-day change
0.00 pp
From 26.61% on 20-09-2026
20-09-202620-10-2026
EPSS score26.61%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
1 foundExploit Reference (seclists.org)
Maturity: unknown
Weaknesses
CWE · root causeAffected systems
Pfsense1 product
- pfsense2.5.0
1 vendor · 1 product