CVE-2020-13485 json
Knock Knock plugin IP Whitelist bypass via an X-Forwarded-For HTTP header
published 6y ago modified 4mo ago also GHSA-wxvr-qqm7-6h65 , EUVD-2022-5675
- cvss
- 9.1
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.4%
- EPSS 1.4% chance of exploitation in 30 days, percentile 71%
- public exploits
- 0
- none known
Summary
The Knock Knock plugin before 1.2.8 for Craft CMS allows IP Whitelist bypass via an X-Forwarded-For HTTP header.
Patch / fix
- packagist verbb/knock-knock 1.2.8
- verbb knock_knock 1.2.8
Is CVE-2020-13485 in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.
Check with FencerExploit prediction
1.36% chance of exploitation in the next 30 days, higher than 71% of all scored CVEs (FIRST EPSS, 2026-11-09).
Exploits and checks
- limpidsecurity.pl https://limpidsecurity.pl/security-advisories/1/knock-knock-plugin-for-craft-cms/ referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 9.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N |
| NVD | 2.0 | 6.4 | AV:N/AC:L/Au:N/C:P/I:P/A:N |
| GitHub | 3.1 | 9.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| packagist | verbb/knock-knock | <1.2.8 |
1.2.8 |
Classification
- Weakness
-
- CWE-697 Incorrect Comparison
References
-
limpidsecurity.pl
/security-advisories/1/knock-knock-plugin-for-craft-cms/
exploit, third-party-advisory
-
github.com
/verbb/knock-knock/blob/craft-3/CHANGELOG.md
web, release-notes, third-party-advisory
-
nvd.nist.gov
/vuln/detail/CVE-2020-13485
advisory
-
github.com
/verbb/knock-knock
package
-
limpidsecurity.pl
/security-advisories/1/knock-knock-plugin-for-craft-cms
web
Sources
- CVE List CVE-2020-13485
- GitHub Advisory GHSA-wxvr-qqm7-6h65
- NVD CVE-2020-13485
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.