CVE-2020-13485
CVE-2020-13485 is a critical-severity vulnerability in Verbb Knock Knock with a CVSS 3.x base score of 9.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-697.
Key facts
- Severity: Critical (CVSS 3.x base score 9.1)
- CVSS v2: 6.4
- EPSS exploit prediction: 1% (68th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-697
- Affected product: Verbb Knock Knock
- Published:
- Last modified:
Description
The Knock Knock plugin before 1.2.8 for Craft CMS allows IP Whitelist bypass via an X-Forwarded-For HTTP header.
Frequently asked questions
- What is 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.
- How severe is CVE-2020-13485?
- CVE-2020-13485 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.
- Is CVE-2020-13485 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (68th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2020-13485?
- CVE-2020-13485 affects Verbb Knock Knock. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2020-13485?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
- When was CVE-2020-13485 published?
- CVE-2020-13485 was published on 2020-05-25 and last updated on 2026-06-17.
References
- https://github.com/verbb/knock-knock/blob/craft-3/CHANGELOG.md
- https://limpidsecurity.pl/security-advisories/1/knock-knock-plugin-for-craft-cms/
Affected products (1)
- cpe:2.3:a:verbb:knock_knock:*:*:*:*:*:craft_cms:*:*
More vulnerabilities in Verbb Knock Knock
- CVE-2020-13486 — Medium (CVSS 6.1): The Knock Knock plugin before 1.2.8 for Craft CMS allows malicious redirection.
All CVEs affecting Verbb Knock Knock →
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