CVE-2025-4727

Meteor livedata_server.js Object.assign redos

LOW
3.7
CVSS Score
Published: May 15, 2025 at 11:00 PM UTC
Updated: June 17, 2026 at 09:33 AM UTC
1 product affected across 1 vendorMeteor

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Severity
LOW3.7
Exploit prediction
EPSS 0.9%
SSVC
PoC

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 3.2.23.2.03.2.1
Affected range stops below 3.2.2, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

SSVC — Action Prioritization

SSVCPoCNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

3.7LOWVulDB
Vector?

Quick Info

StatusANALYZED
CWE
CWE-400CWE-1333

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