What is CVE-2018-18865?

CVE-2018-18865 is a high-severity vulnerability in Apple macOS, classified under Information Disclosure. CVSS score: 8.1/10. Published 2018-11-20.

How severe is CVE-2018-18865?

High severity. CVSS v3 base score is 8.1 out of 10.

Information disclosure in Apple macOS

CVE-2018-18865

The Royal browser extensions TS before 4.3.60728 (Release Date 2018-07-28) and TSX before 3.3.1 (Release Date 2018-09-13) allow Credentials Disclosure.

Vulnerability class: Information Disclosure

Published 2018-11-20 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.1 (High). Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.080 (94.6th percentile), scored 2026-10-02.

Low probability of exploitation in the next 30 days, but still tracked. 95th percentile — 94.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.080 · newest: 0.080 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-200 — Information Disclosure

References

seclists.org/fulldisclosure/2018/Nov/4 (mailing-list, Exploit, Mailing List, Third Party Advisory)
www.exploit-db.com/exploits/45783/ (Exploit, VDB Entry, Third Party Advisory, exploit)
packetstormsecurity.com/files/150136/Royal-TS-X-Information-Disclosure.html (Exploit, VDB Entry, Third Party Advisory)
seclists.org/fulldisclosure/2018/Nov/25 (mailing-list, Exploit, Mailing List, Third Party Advisory)

Frequently asked questions

What is CVE-2018-18865?: CVE-2018-18865 is a high-severity vulnerability in Apple macOS, classified under Information Disclosure. CVSS score: 8.1/10. Published 2018-11-20.
How severe is CVE-2018-18865?: High severity. CVSS v3 base score is 8.1 out of 10.