Vulnerabilities
Projects
Vulnerability Disclosure
About Us
Contact Us
Mend.io Vulnerability Database
What is a CVE vulnerability ID? 
What is a WS vulnerability ID?
What is an MSC vulnerability ID?
New vulnerability? Tell us about it!
What is a WS vulnerability ID?
What is an MSC vulnerability ID?
We found results for “”
CVE-2025-48877
Good to know:
Date: June 9, 2025
Discourse is an open-source discussion platform. Prior to version 3.4.4 of the "stable" branch, version 3.5.0.beta5 of the "beta" branch, and version 3.5.0.beta6-dev of the "tests-passed" branch, Codepen is present in the default "allowed_iframes" site setting, and it can potentially auto-run arbitrary JS in the iframe scope, which is unintended. This issue is patched in version 3.4.4 of the "stable" branch, version 3.5.0.beta5 of the "beta" branch, and version 3.5.0.beta6-dev of the "tests-passed" branch. As a workaround, the Codepen prefix can be removed from a site's "allowed_iframes".
Severity Score
Severity Score
Weakness Type (CWE)
Insecure Automated Optimizations
CWE-1038Top Fix
CVSS v3.1
| Base Score: |
|
|---|---|
| Attack Vector (AV): | NETWORK |
| Attack Complexity (AC): | LOW |
| Privileges Required (PR): | NONE |
| User Interaction (UI): | NONE |
| Scope (S): | UNCHANGED |
| Confidentiality (C): | HIGH |
| Integrity (I): | HIGH |
| Availability (A): | HIGH |