Search/CVE-2025-64528
● CVE — Medium

CVE-2025-64528

VendordiscourseProductdiscourseDiscoveredDec 30, 2025UpdatedFeb 20, 2026

Discourse is an open source discussion platform. Prior to versions 3.5.3, 2025.11.1, and 2025.12.0, an attacker who knows part of a username can find the user and their full name via UI or API, even when enable_names is disabled. Versions 3.5.3, 2025.11.1, and 2025.12.0 contain a fix.

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CVSS v3.1
5.3 MEDIUM
EPSS
0.29%
probability of exploitation in 30 days
CISA KEV
Not listed
no confirmed exploitation reported
News coverage
0
sources referencing this CVE
Related IOCs
0
seen in the same coverage
EPSS Trend
Aug 16, 2026 → Sep 26, 2026
▲ 0.04pp
0.25% → 0.29% over 5 tracked changes
CVSS v3.1 Detail
Attack VectorNETWORK
Attack ComplexityLOW
Privileges RequiredNONE
User InteractionNONE
ScopeUNCHANGED
ConfidentialityLOW
IntegrityNONE
AvailabilityNONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Connections
2 relationships
Timeline
disclosure → media coverage
Dec 30, 2025
Disclosure — published as a CVE record. · last revised by NVD Feb 20, 2026