CVE-2025-4727

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.

CVSS v3.1 Score

3.7

LOW

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L

Weakness Type (CWE)

CWE-400 Uncontrolled Resource Consumption

CWE-1333 CWE-1333

Affected Products

Vendor	Product	Versions
meteor	meteor	< 3.2.2

References

Advisories & Patches

https://github.com/meteor/meteor/commit/f7ea6817b90952baaea9baace2a3b4366fee6a63 https://github.com/meteor/meteor/pull/13721

Exploits

https://vuldb.com/?submit.570441 https://vuldb.com/?submit.570441

Other References

https://github.com/meteor/meteor/issues/13713 https://github.com/meteor/meteor/releases/tag/release/METEOR%403.2.2 https://vuldb.com/?ctiid.309029 https://vuldb.com/?id.309029

Frequently Asked Questions

What is CVE-2025-4727? +

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. It has a CVSS v3.1 base score of 3.7 (LOW).

How severe is CVE-2025-4727? +

CVE-2025-4727 has a CVSS v3.1 score of 3.7 out of 10, rated LOW. This is a low-severity vulnerability with limited impact.

What products are affected by CVE-2025-4727? +

CVE-2025-4727 affects products from meteor, specifically: meteor. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-4727? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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