VulnerabilityAnalyzed

CVE-2024-4023

A stored cross-site scripting (XSS) vulnerability exists in flatpressblog/flatpress version 1.3.

HIGH 8.1EPSS 0.78%

Does this matter?

High impact if exploited, but EPSS currently rates exploitation as unlikely (0.78%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.

Description

A stored cross-site scripting (XSS) vulnerability exists in flatpressblog/flatpress version 1.3. When a user uploads a file with a `.xsig` extension and directly accesses this file, the server responds with a Content-type of application/octet-stream, leading to the file being processed as an HTML file. This allows an attacker to execute arbitrary JavaScript code, which can be used to steal user cookies, perform HTTP requests, and access content of the same origin.

CVSS 3.0: 8.1 HIGHCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H
EPSS: 0.78% probability · 54th percentile
CISA KEV: Not listed
Weakness: CWE-79
Affected: flatpress/flatpress
Source: security@huntr.dev

References

https://github.com/flatpressblog/flatpress/commit/3c9cc69364a45fd3f92d4bd606344b5dd1205d6aPatch
https://huntr.com/bounties/ed803c13-0858-4c22-93ba-bf2384ab1e9dExploit, Third Party Advisory

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.