CVE-2019-12250

6.1 mediumEPSS 0.8%

Medium (6.1) in identityserver identityserver4. EPSS 0.8% chance of exploitation in the next 30 days.

IdentityServer IdentityServer4 through 2.4 has stored XSS via the httpContext to the host/Extensions/RequestLoggerMiddleware.cs LogForErrorContext method, which can be triggered by viewing a log. NOTE: the software maintainer disputes that this is a vulnerability because the request logger is not part of IdentityServer but only our development test host

Severity

CVSS 3.0

6.1 medium

CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

EPSS: 0.8% chance of exploitation in the next 30 days; higher than 58% of CVEs (scores of 2026-10-31)
CWE: CWE-79
Published: 2019-05-21
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

identityserver:identityserver4

References

https://github.com/IdentityServer/IdentityServer4/issues/3279
https://github.com/IdentityServer/IdentityServer4/issues/3279

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