CVE-2026-11520 SourceCodester Inventory System header.php cross site scripting
Remote attackers can execute arbitrary scripts in the SourceCodester Inventory System via header.php, potentially compromising user sessions.
- 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-2026-11520?
CVE-2026-11520 is a medium-severity cross-site scripting vulnerability in SourceCodester Inventory System, published on 8 Jun 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
A weakness has been identified in SourceCodester Inventory System 1.0. Affected by this issue is some unknown functionality of the file header.php. This manipulation causes cross site scripting. It is possible to initiate the attack remotely. The exploit has been made available to the public and could be used for attacks. Multiple parameters might be affected.
Which versions are affected by CVE-2026-11520?
How do I fix CVE-2026-11520?
No fix has been published for CVE-2026-11520 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-2026-11520 being exploited?
There is no known exploitation of CVE-2026-11520 in the wild and no public exploit code.
Sources
Also known as GHSA-j47h-85f4-43gf.