CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
AI Score
Confidence
High
EPSS
Percentile
37.6%
SvelteKit is a web development framework. The SvelteKit framework offers developers an option to create simple REST APIs. This is done by defining a +server.js
file, containing endpoint handlers for different HTTP methods.
SvelteKit provides out-of-the-box cross-site request forgery (CSRF) protection to its users. While the implementation does a sufficient job in mitigating common CSRF attacks, prior to version 1.15.1, the protection can be bypassed by simply specifying a different Content-Type
header value.
If abused, this issue will allow malicious requests to be submitted from third-party domains, which can allow execution of operations within the context of the victimβs session, and in extreme scenarios can lead to unauthorized access to usersβ accounts.
SvelteKit 1.15.1 updates the is_form_content_type
function call in the CSRF protection logic to include text/plain
. As additional hardening of the CSRF protection mechanism against potential method overrides, SvelteKit 1.15.1 is now performing validation on PUT
, PATCH
and DELETE
methods as well. This latter hardening is only needed to protect users who have put in some sort of ?_method= override
feature themselves in their handle
hook, so that the request that resolve sees could be PUT
/PATCH
/DELETE
when the browser issues a POST
request.
[
{
"vendor": "sveltejs",
"product": "kit",
"versions": [
{
"version": "< 1.15.1",
"status": "affected"
}
]
}
]
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
AI Score
Confidence
High
EPSS
Percentile
37.6%