TI-2018-04902 Aliases CVE-2018-6654 GHSA-mj32-gm74-p82v

The Grammarly extension before 2018-02-02 for Chrome allows remote attackers to discover…

LOW 39CWE-346Published 2018-02-06 · Updated 2024-09-17

Key facts

Attack vector: Network
Privileges required: None
User interaction: Required
Attack complexity: Low
Impact type: Security bypass
Confidentiality · integrity · availability: High · High · High
Fix status: No fix listed

Attack profile from CVSS 3.0 · NVD. Fix status from CNA. Impact type from CWE-346.

Summary

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.

Why it matters now

EPSS 0.00506 43rd percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by NVD

Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
—	—	all versions	—	No fix listed	CNA

— Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:grammarly:grammarly:2018-02-02:::::chrome::	2018-02-02	Vulnerable	Grammarly

cpe:2.3:a:grammarly:grammarly:2018-02-02:*:*:*:*:chrome:*:* Versions 2018-02-02 Vulnerable ·Grammarly

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2018-6654
2026-10-03 Alias added: GHSA-mj32-gm74-p82v

References

Exploit 1

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

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences