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» CVE-2020-13486
The Knock Knock plugin before 1.2.8 for Craft CMS allows malicious redirection.
NVD Status： Modified ，CVE State: published
Threat Intelligence & Risk Assessment for CVE-2020-13486
Conclusion & alert: CVE-2020-13486 is rated Moderate Risk (41.5/100) : CVSS Medium severity, with low exploitation likelihood (EPSS 0.68%).Mandatory action: Review affected assets and schedule remediation.
Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.
Exploit prediction scoring system (EPSS) score for CVE-2020-13486
EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).
#
Date
Old EPSS score
New EPSS score
Delta (New - Old)
1
2026-06-15
0.20%
0.68%
+0.48%
2
2025-03-17
0.08%
0.20%
+0.12%
3
2023-03-07
—
0.08%
—
Full EPSS history
(7 records total)
Common vulnerability scoring system (CVSS) metrics for CVE-2020-13486
CVSS metrics for this CVE.
Base score
Version
Severity
Vector
Exploitability
Impact
Score source
6.1
3.1
MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:C)
Breaking this can reach past the original component and bite other resources—bigger blast radius.
Confidentiality (C:L)
Some sensitive info could get out, but not a total data dump.
Integrity (I:L)
Attackers could change some data, but it’s limited—not everything goes.
Availability (A:N)
Service keeps running; no real outage angle.
2.8
2.7
[email protected]
5.8
2.0
MEDIUM
AV:N/AC:M/Au:N/C:P/I:P/A:N
Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:N)
No availability impact.
8.6
4.9
[email protected]
Weakness enumeration for CVE-2020-13486
GitHub Security Advisory for CVE-2020-13486
GHSA-m69r-4h68-xq7j · Severity: medium · Ecosystem: composer
— Knock Knock plugin Open redirection vulnerability
Affected software / configurations for CVE-2020-13486
Vendor
Product
Version
Raw CPE
verbb
knock_knock
< 1.2.8
cpe:2.3:a:verbb:knock_knock:*:*:*:*:*:craft_cms:*:*
References for CVE-2020-13486
cvelogic
Threat Intelligence