What is CVE-2018-1000815?

CVE-2018-1000815 is a medium-severity vulnerability in Brave, classified under Improper Input Validation. CVSS score: 4.3/10. Published 2018-12-20.

How severe is CVE-2018-1000815?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Improper input validation in Brave

CVE-2018-1000815

Brave Software Inc. Brave version version 0.22.810 to 0.24.0 contains a Other/Unknown vulnerability in function ContentSettingsObserver::AllowScript() in content_settings_observer.cc that can result in Websites can run inline JavaScript even if script is blocked, making attackers easier to track users. This attack appear to be exploitable via the victim must visit a specially crafted website. This vulnerability appears to have been fixed in 0.25.2.

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

Published 2018-12-20 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N.

EPSS exploit prediction

EPSS: 0.011 (64.9th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 65th percentile — 64.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.011 · newest: 0.011 · change: 0.000

Affected products

Brave

Weakness classification (CWE)

CWE-20 — Improper Input Validation

References

github.com/brave/browser-laptop/issues/15232 (Patch, Third Party Advisory)
github.com/brave/muon/commit/c18663aa171c6cdf03da3e8c70df8663645b97c4 (Patch)
github.com/brave/muon/pull/651 (Patch)

Frequently asked questions

What is CVE-2018-1000815?: CVE-2018-1000815 is a medium-severity vulnerability in Brave, classified under Improper Input Validation. CVSS score: 4.3/10. Published 2018-12-20.
How severe is CVE-2018-1000815?: Medium severity. CVSS v3 base score is 4.3 out of 10.