CVE-2023-53891 Blackcat CMS 1.4 Stored Cross-Site Scripting via Page Modification
Authenticated attackers can inject malicious scripts into page content, leading to code execution or account takeover when other users view the page.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2023-53891?
CVE-2023-53891 is a medium-severity cross-site scripting vulnerability in blackcat-cms Blackcat CMS, published on 15 Dec 2025. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
Blackcat CMS 1.4 contains a stored cross-site scripting vulnerability that allows authenticated users to inject malicious scripts into page content. Attackers can insert JavaScript payloads in the page modification interface that execute when other users view the compromised page.
Weakness: CWE-79
Which versions are affected by CVE-2023-53891?
It affects 1 product.
Products include Blackcat-Cms Blackcat Cms.
How do I fix CVE-2023-53891?
No fix has been published for CVE-2023-53891 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-2023-53891 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-53891 exists.
Other vulnerabilities in blackcat-cms Blackcat CMS
Sources
Also known as GHSA-f5gv-p76p-jp44.