What is CVE-2018-6654?

CVE-2018-6654 is a high-severity vulnerability in Grammarly, classified under Origin Validation Error. CVSS score: 8.8/10. Published 2018-02-06.

How severe is CVE-2018-6654?

High severity. CVSS v3 base score is 8.8 out of 10.

Vulnerability in Grammarly

CVE-2018-6654

The Grammarly extension before 2018-02-02 for Chrome allows remote attackers to discover authentication tokens via an 'action: "user"' request to iframe.gr_-ifr, because the exposure of these tokens is not restricted to any specific web site.

EPSS: 0.005 (40.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

Affected products

Grammarly — versions 2018-02-02
N/a — versions n/a

Weakness classification (CWE)

CWE-346 — Origin Validation Error

References

cve@mitre.org (Exploit, Third Party Advisory, x_refsource_MISC, Issue Tracking)

Frequently asked questions

What is CVE-2018-6654?: CVE-2018-6654 is a high-severity vulnerability in Grammarly, classified under Origin Validation Error. CVSS score: 8.8/10. Published 2018-02-06.
How severe is CVE-2018-6654?: High severity. CVSS v3 base score is 8.8 out of 10.