CVE-2025-45388 Cross-site scripting in n/a
Stored XSS in Wagtail CMS document uploads allows code execution if files are served without proper security headers.
- 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-2025-45388?
CVE-2025-45388 is a medium-severity cross-site scripting vulnerability in n/a, published on 7 May 2025. 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
Wagtail CMS 6.4.1 is vulnerable to a Stored Cross-Site Scripting (XSS) in the document upload functionality. Attackers can inject malicious code inside a PDF file. When a user clicks the document in the CMS interface, the payload executes. NOTE: this is disputed by the Supplier because "It has been well documented that when serving uploaded files using a method outside of Wagtail (which admittedly is the default), it requires additional configuration from the developer, because Wagtail cannot control how these are served. ... For example, if a Wagtail instance is configured to upload files into AWS S3, Wagtail cannot control the permissions on how they're served, nor any headers used when serving them (a limitation of S3)."
Weakness: CWE-79
Which versions are affected by CVE-2025-45388?
How do I fix CVE-2025-45388?
No fix has been published for CVE-2025-45388 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-2025-45388 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-45388 exists.
Sources
Also known as GHSA-q787-4mx6-96qg.