Vulnerability Details : CVE-2020-21487
Cross Site Scripting vulnerability found in Netgate pfSense 2.4.4 and ACME package v.0.6.3 allows attackers to execute arbitrary code via the RootFolder field of acme_certificates.php.
Vulnerability category: Cross site scripting (XSS)Execute code
Products affected by CVE-2020-21487
- cpe:2.3:a:netgate:pfsense:2.4.4:-:*:*:*:*:*:*
- cpe:2.3:a:netgate:pfsense_acme_package:0.6.3:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2020-21487
0.53%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 65 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2020-21487
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
9.6
|
CRITICAL | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H |
2.8
|
6.0
|
134c704f-9b21-4f2e-91b3-4a467353bcc0 | 2025-02-13 |
|
9.6
|
CRITICAL | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H |
2.8
|
6.0
|
NIST |
CWE ids for CVE-2020-21487
-
The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.Assigned by:
- 134c704f-9b21-4f2e-91b3-4a467353bcc0 (Secondary)
- nvd@nist.gov (Primary)
References for CVE-2020-21487
-
https://redmine.pfsense.org/issues/9888
Bug #9888: ACME output sent to browser without encoding - pfSense Packages - pfSense bugtrackerIssue Tracking;Patch
-
https://github.com/pfsense/FreeBSD-ports/commit/a6f443cde51e7fcf17e51f16014d3589253284d8
Prevent ACME output from being interpreted as HTML. Fixes #9888 · pfsense/FreeBSD-ports@a6f443c · GitHubPatch
Jump to