CVE-2025-4727

low-risk

Published 2025-05-15

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.

Do I need to act?

0.73% chance of exploitation

EPSS score — low exploit probability

Not on CISA KEV list

No confirmed active exploitation reported to CISA

Patch status unknown

Check vendor advisories for fix availability and mitigation guidance

CVSS 3.7/10 Low

NETWORK / HIGH complexity

Affected Products (1)

Meteor

Affected Vendors

Meteor

References (8)

Issue Tracking https://github.com/meteor/meteor/commit/f7ea6817b90952baaea9baace2a3b4366fee6a63

Broken Link https://github.com/meteor/meteor/issues/13713

Issue Tracking https://github.com/meteor/meteor/pull/13721

Release Notes https://github.com/meteor/meteor/releases/tag/release/METEOR%403.2.2

Permissions Required https://vuldb.com/?ctiid.309029

Third Party Advisory https://vuldb.com/?id.309029

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

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low-risk

Severity 13/34 · Low

Exploitability 2/34 · Minimal

Exposure 5/34 · Minimal