CVE-2019-12250
CVE-2019-12250 is a medium-severity vulnerability in Identityserver Identityserver4 with a CVSS 3.x base score of 6.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-79.
Key facts
- Severity: Medium (CVSS 3.x base score 6.1)
- CVSS v2: 4.3
- EPSS exploit prediction: 1% (54th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-79
- Affected product: Identityserver Identityserver4
- Published:
- Last modified:
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
Frequently asked questions
- What is CVE-2019-12250?
- 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
- How severe is CVE-2019-12250?
- CVE-2019-12250 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
- Is CVE-2019-12250 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (54th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2019-12250?
- CVE-2019-12250 affects Identityserver Identityserver4. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2019-12250?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- When was CVE-2019-12250 published?
- CVE-2019-12250 was published on 2019-05-21 and last updated on 2026-06-17.
References
Affected products (1)
- cpe:2.3:a:identityserver:identityserver4:*:*:*:*:*:*:*:*
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