CVE-2023-1104 Cross-site Scripting (XSS) - Stored in flatpressblog/flatpress

High 8.1 Published 1 Mar 2023 Updated 11 Mar 2025

Stored Cross-Site Scripting in FlatPress allows attackers to inject malicious scripts, potentially leading to session hijacking or code execution.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: A user has to click or open something
Fix: None listed

What is CVE-2023-1104?

CVE-2023-1104 is a high-severity cross-site scripting vulnerability in flatpressblog/flatpress, published on 1 Mar 2023. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official description

Cross-site Scripting (XSS) - Stored in GitHub repository flatpressblog/flatpress prior to 1.3.

Weakness: CWE-79

Which versions are affected by CVE-2023-1104?

It affects 1 product.

Products include Flatpress Flatpress.

How do I fix CVE-2023-1104?

No fix has been published for CVE-2023-1104 yet. Limit exposure of the affected software until one is available.

Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.

Is CVE-2023-1104 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-1104 exists.

Sources

Also known as GHSA-9rxm-rvcp-xvp2.