CVE-2025-65778 Cross-site scripting in n/a
Attackers can execute arbitrary HTML/JS in the application origin via malicious attachments, leading to session theft and CSRF actions.
- 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-2025-65778?
CVE-2025-65778 is a high-severity cross-site scripting vulnerability in n/a, published on 15 Dec 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
An issue was discovered in Wekan The Open Source kanban board system up to version 18.15, fixed in 18.16. Uploaded attachments can be served with attacker-controlled Content-Type (text/html), allowing execution of attacker-supplied HTML/JS in the application's origin and enabling session/token theft and CSRF actions.
Weakness: CWE-79
Which versions are affected by CVE-2025-65778?
It affects 1 product.
Products include Wekan Project Wekan.
How do I fix CVE-2025-65778?
No fix has been published for CVE-2025-65778 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-2025-65778 being exploited?
There is no known exploitation of CVE-2025-65778 in the wild and no public exploit code.
Other vulnerabilities in n/a
- CVE-2026-30843 Wekan has Cross-Board IDOR in Custom Fields Update Endpoints
- CVE-2026-30844 Wekan Vulnerable to SSRF through Lack of Validation or Filtering in Attachment URL Loading
- CVE-2026-30847 Wekan Credential Leak via notificationUsers Publication Exposes Password Hashes and Session Tokens
- CVE-2025-65780 Missing authorization in n/a
- CVE-2026-30846 Wekan Exposes All Global Webhook Integrations through globalwebhooks Publication
Sources
Also known as GHSA-9hv3-wvf3-ffmp.