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.
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.005 (40.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 41st percentile — 40.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000
Affected products
- Grammarly — versions 2018-02-02
Weakness classification (CWE)
References
- bugs.chromium.org/p/project-zero/issues/detail (Exploit, Third Party Advisory, 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.