CVE-2025-4727

Public Exploit
Meteor livedata_server.js Object.assign redos

Description

A vulnerability was found in Meteor up to 3.2.1 and classified as problematic. This issue affects the function Object.assign of the file packages/ddp-server/livedata_server.js. The manipulation of the argument forwardedFor leads to inefficient regular expression complexity. The attack may be initiated remotely. The complexity of an attack is rather high. The exploitation is known to be difficult. The exploit has been disclosed to the public and may be used. Upgrading to version 3.2.2 is able to address this issue. The identifier of the patch is f7ea6817b90952baaea9baace2a3b4366fee6a63. It is recommended to upgrade the affected component.

Category

6.3
CVSS
Severity: Medium
CVSS 4.0 •
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.06%
Third-Party Advisory vuldb.com
Affected: n/a Meteor
Published at:
Updated at:

References

Frequently Asked Questions

What is the severity of CVE-2025-4727?
CVE-2025-4727 has been scored as a medium severity vulnerability.
How to fix CVE-2025-4727?
To fix CVE-2025-4727, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2025-4727 being actively exploited in the wild?
It is possible that CVE-2025-4727 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2025-4727?
CVE-2025-4727 affects n/a Meteor.
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