CVE-2018-18358

5.7 MEDIUM 0.4% exploit odds No fix listed

What it is

Lack of special casing of localhost in WPAD files in Google Chrome prior to 71.0.3578.80 allowed an attacker on the local network segment to proxy resources on localhost via a crafted WPAD file.

At a glance

Exploitability: Can be exploited from the same network segment without logging in, but needs a user to act. High risk of data tampering.
Exploit odds: 0.4% chance of exploitation in the next 30 days (EPSS).
Fix: No patch or advisory is linked yet. Look at mitigations or restrict exposure.

Timeline

2018-12-11 16:29 UTC PublishedDisclosed publicly on CVE.org and NVD
2026-06-17 01:47 UTC Last updatedMost recent change to the record

Why it ranks here

Exploited in the wild: no, CISA does not list it.
Exploit odds: 0.4% in the next 30 days (EPSS).
Severity: 5.7 MEDIUM (CVSS).
Fix: none linked yet, which raises it.

Details

Published: 2018-12-11 16:29 UTC
Last modified: 2026-06-17 01:47 UTC
Exploit probability: 0.4% · EPSS, next 30 days
Weakness: CWE-20 · Improper input validation
Record status: Modified

Affected

Google Chrome < 71.0.3578.80
Debian Linux 9.0
Redhat Enterprise Linux Desktop 6.0
Redhat Enterprise Linux Server 6.0
Redhat Enterprise Linux Workstation 6.0

Attack profile CVSS 3.0 · 5.7

Attack vector: Adjacent network
Complexity: Low
Privileges needed: None
User interaction: Required
Scope: Unchanged
Confidentiality: None
Integrity: High
Availability: None

Raw vector

CVSS:3.0/AV:A/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N

Is it in your code?

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References

NVD record · CVE.org record