GeyserMC records

2 published records for vendor GeyserMC.

Researcher profile

Entered KEV: 0 · 0%
Weaponized: 0 · 0%
Pre-auth RCE: 0
With a fix record: 100%
Median publish → KEV: No record has entered KEV

Pre-auth RCE: flaws that let an attacker run code over the network without an account. Median publish → KEV: the typical time between a record being published and CISA listing it as exploited.

Records by year

Bar: total · dark part: CISA KEV.

Recurring classes

The weakness classes this vendor ships most often: where to look.

Attack profile

All records

2 records

CVE records
Action	CVE	Vulnerability	Severity	EPSS · Published
39Monitor	CVE-2021-39177No exploit	User impersonation due to incorrect handling of the login JWTgeysermc · geyser · CWE-287 Pre-auth Auth bypass	Critical9.8	1.4%Aug 30, 2021
17Monitor	CVE-2026-42188No exploit	Geyser: Server-Side Request Forgery (SSRF) via Player Head Texture URLgeysermc · geyser · CWE-918 Pre-auth SSRF	Medium4.3	0.1%May 11, 2026

CVE-2021-39177
39Monitor
User impersonation due to incorrect handling of the login JWT
CriticalCVSS 9.8No exploitEPSS 1%
- Pre-auth
- Auth bypass
geysermc · geyserAug 30, 2021
CVE-2026-42188
17Monitor
Geyser: Server-Side Request Forgery (SSRF) via Player Head Texture URL
MediumCVSS 4.3No exploitEPSS 0%
- Pre-auth
- SSRF
geysermc · geyserMay 11, 2026