VulnerabilityModified
CVE-2020-13485
The Knock Knock plugin before 1.2.8 for Craft CMS allows IP Whitelist bypass via an X-Forwarded-For HTTP header.
CRITICAL 9.1EPSS 1.35%
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (1.35%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
The Knock Knock plugin before 1.2.8 for Craft CMS allows IP Whitelist bypass via an X-Forwarded-For HTTP header.
- CVSS 3.1
- 9.1 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
- EPSS
- 1.35% probability · 71th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-697
- Affected
- verbb/knock knock
- Source
- cve@mitre.org
EPSS 1.4% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- https://github.com/verbb/knock-knock/blob/craft-3/CHANGELOG.mdRelease Notes, Third Party Advisory
- https://limpidsecurity.pl/security-advisories/1/knock-knock-plugin-for-craft-cms/Exploit, Third Party Advisory
- https://github.com/verbb/knock-knock/blob/craft-3/CHANGELOG.mdRelease Notes, Third Party Advisory
- https://limpidsecurity.pl/security-advisories/1/knock-knock-plugin-for-craft-cms/Exploit, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.