What is CVE-2016-8504?

CVE-2016-8504 is a medium-severity vulnerability in Yandex Browser, classified under Cross-Site Request Forgery (CSRF). CVSS score: 4.3/10. Published 2016-10-26.

How severe is CVE-2016-8504?

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

CSRF in Yandex Browser

CVE-2016-8504

CSRF of synchronization form in Yandex Browser for desktop before version 16.6 could be used by remote attacker to steal saved data in browser profile.

Vulnerability class: CSRF (Cross-Site Request Forgery)

Published 2016-10-26 · 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: 0.006 (44.6th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 45th percentile — 44.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000

Affected products

Yandex Browser
Yandex N.v. Browser For Desktop — versions before 16.6 for OSx and Windows

Weakness classification (CWE)

CWE-352 — Cross-Site Request Forgery (CSRF)

References

www.securityfocus.com/bid/93924 (VDB Entry, Third Party Advisory, vdb-entry)
browser.yandex.com/security/changelogs/ (Release Notes, Vendor Advisory)

Frequently asked questions

What is CVE-2016-8504?: CVE-2016-8504 is a medium-severity vulnerability in Yandex Browser, classified under Cross-Site Request Forgery (CSRF). CVSS score: 4.3/10. Published 2016-10-26.
How severe is CVE-2016-8504?: Medium severity. CVSS v3 base score is 4.3 out of 10.