CVE-2025-49149 Dify has XSS vulnerability

Medium 5.3 Published 17 Jun 2025 Updated 18 Jun 2025

Attackers can inject malicious scripts into Dify web pages, potentially executing code or stealing user sessions.

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-2025-49149?

CVE-2025-49149 is a medium-severity cross-site scripting vulnerability in langgenius dify, published on 17 Jun 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

Dify is an open-source LLM app development platform. In version 1.2.0, there is insufficient filtering of user input by web applications. Attackers can use website vulnerabilities to inject malicious script code into web pages. This may result in a cross-site scripting (XSS) attack when a user browses these web pages. At time of posting, there is no known patched version.

Weakness: CWE-79

Which versions are affected by CVE-2025-49149?

It affects 1 product.

Products include Langgenius Dify.

How do I fix CVE-2025-49149?

No fix has been published for CVE-2025-49149 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-2025-49149 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-49149 exists.

Sources

Also known as GHSA-grmh-ww4v-5cgj.