CVE-2026-53992 Reflected XSS in ProjectSend thumbnails-regenerate.php via start_date / end_date Parameters
Reflected XSS in ProjectSend allows attackers to execute scripts via crafted URLs, potentially stealing sessions or modifying application settings.
- 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-2026-53992?
CVE-2026-53992 is a medium-severity cross-site scripting vulnerability in ProjectSend, published on 5 Aug 2026. 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
ProjectSend r2029 contains a reflected cross-site scripting vulnerability in thumbnails-regenerate.php that allows remote attackers to inject arbitrary HTML and JavaScript by supplying unsanitized values in the start_date and end_date GET parameters, which are echoed unescaped into HTML attribute values. Attackers can craft a malicious URL that, when followed by an authenticated victim with edit_settings permissions, executes injected scripts in the application origin to steal session cookies or perform unauthorized actions including user management, file management, and application settings changes.
Weakness: CWE-79
Which versions are affected by CVE-2026-53992?
How do I fix CVE-2026-53992?
No fix has been published for CVE-2026-53992 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-2026-53992 being exploited?
There is no known exploitation of CVE-2026-53992 in the wild and no public exploit code.
Sources
Also known as GHSA-5fp2-v633-2824.