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CVE-2025-4727 – Meteor DDP-Server Regular Expression Complexity Remote Vulnerability

The following table lists the changes that have been made to the
CVE-2025-4727 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution
of a vulnerability, and for identifying the most recent changes that may
impact the vulnerability’s severity, exploitability, or other characteristics.

  • New CVE Received
    by [email protected]

    May. 15, 2025

    Action Type Old Value New Value
    Added 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.
    Added CVSS V4.0 AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
    Added CVSS V3.1 AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
    Added CVSS V2 (AV:N/AC:H/Au:N/C:N/I:N/A:P)
    Added CWE CWE-400
    Added CWE CWE-1333
    Added Reference https://github.com/meteor/meteor/commit/f7ea6817b90952baaea9baace2a3b4366fee6a63
    Added Reference https://github.com/meteor/meteor/issues/13713
    Added Reference https://github.com/meteor/meteor/pull/13721
    Added Reference https://github.com/meteor/meteor/releases/tag/release/METEOR%403.2.2
    Added Reference https://vuldb.com/?ctiid.309029
    Added Reference https://vuldb.com/?id.309029
    Added Reference https://vuldb.com/?submit.570441
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