CVE-2019-12250

MEDIUM 6.1CVE-2019-12250 · Published 21/05/2019 · updated 17/06/2026

In short

CVE-2019-12250 is a MEDIUM (CVSS 6.1) vulnerability affecting identityserver4 (identityserver).
Chance of exploitation in the next 30 days (EPSS): 0.85%, higher than 58.3% of all vulnerabilities.
No patched version is listed yet: follow the vendor's advisory in References.

Package	Affected versions	Patched versions
identityserver4 identityserver	`≤ 2.4.0`	No fix yet

Description

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

References

IdentityServer/IdentityServer4 · Exploit

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