CVE-2024-45047

Public Exploit
Potential mXSS vulnerability due to improper HTML escaping in svelte

Description

svelte performance oriented web framework. A potential mXSS vulnerability exists in Svelte for versions up to but not including 4.2.19. Svelte improperly escapes HTML on server-side rendering. The assumption is that attributes will always stay as such, but in some situation the final DOM tree rendered on browsers is different from what Svelte expects on server-side rendering. This may be leveraged to perform XSS attacks, and a type of the XSS is known as mXSS (mutation XSS). More specifically, this can occur when injecting malicious content into an attribute within a `noscript` tag. This issue has been addressed in release version 4.2.19. Users are advised to upgrade. There are no known workarounds for this vulnerability.

Category

5.4
CVSS
Severity: Medium
CVSS 3.1 •
EPSS 0.07%
Third-Party Advisory github.com
Affected: sveltejs svelte
Published at:
Updated at:

References

Link Tags
https://github.com/sveltejs/svelte/security/advisories/GHSA-8266-84wp-wv5c third party advisory exploit

Frequently Asked Questions

What is the severity of CVE-2024-45047?
CVE-2024-45047 has been scored as a medium severity vulnerability.
How to fix CVE-2024-45047?
To fix CVE-2024-45047, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2024-45047 being actively exploited in the wild?
It is possible that CVE-2024-45047 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2024-45047?
CVE-2024-45047 affects sveltejs svelte.
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