Cross-site Request Forgery (CSRF)

published 2021-01-19 5 y ago modified 2026-07-08 4 mo ago also GHSA-49wp-qq6x-g2rf , EUVD-2021-0487

cvss: 5.9; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 1.0%; EPSS 1.0% chance of exploitation in 30 days, percentile 62%
public exploits: 0; none known

This affects the package fastify-csrf before 3.0.0. 1. The generated cookie used insecure defaults, and did not have the httpOnly flag on: cookieOpts: { path: '/', sameSite: true } 2. The CSRF token was available in the GET query parameter

Patch / fix

fixed in 2 links 2

npm fastify-csrf 3.0.0
n/a fastify-csrf 3.0.0

github.com/fastify/fastify-csrf@3c9de36 commit
github.com/fastify/fastify-csrf#26 pull request

Exploit prediction

0.99% chance of exploitation in the next 30 days, higher than 62% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	5.9	CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:L/A:N
NVD	3.1	8.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
NVD	2.0	6.8	AV:N/AC:M/Au:N/C:P/I:P/A:P
GitHub	3.1	8.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected packages

ecosystem	package	affected	fixed in
npm	fastify-csrf	<3.0.0	3.0.0

Affected products

n/a fastify-csrf

Classification

Weakness

CWE-200 Exposure of Sensitive Information to an Unauthorized Actor
CWE-732 Incorrect Permission Assignment for Critical Resource
CWE-352 Cross-Site Request Forgery

References

github.com /fastify/fastify-csrf/pull/26
web, third-party-advisory
github.com /fastify/fastify-csrf/commit/3c9de36e9e73ce0eda9207f84f2ac0243e1f5253
web
snyk.io /vuln/SNYK-JS-FASTIFYCSRF-1062044
web, third-party-advisory
nvd.nist.gov /vuln/detail/CVE-2020-28482
advisory
github.com /fastify/fastify-csrf
package
npmjs.com /package/fastify-csrf
web

Sources

Fencer Vulns 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.

Summary