CVE-2018-6654

Severity: high (CVSS 8.8 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.5% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2018-02-06 · updated 2026-06-17
Weakness: CWE-346

Description

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.

Affected products

Grammarly: 2018-02-02

References

https://bugs.chromium.org/p/project-zero/issues/detail?id=1527
https://bugs.chromium.org/p/project-zero/issues/detail?id=1527

Get alerted when CVE-2018-6654 or the next vulnerability affects your stack