What is CVE-2018-8899?

CVE-2018-8899 is a medium-severity vulnerability in Identityserver Identityserver4, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2018-03-22.

How severe is CVE-2018-8899?

Medium severity. CVSS v3 base score is 6.1 out of 10.

XSS in Identityserver Identityserver4

CVE-2018-8899

IdentityServer IdentityServer4 1.x before 1.5.3 and 2.x before 2.1.3 does not encode the redirect URI on the authorization response page, which might lead to XSS in some configurations.

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.013 (66.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

Affected products

Identityserver Identityserver4
N/a — versions n/a

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

cve@mitre.org (Patch, Third Party Advisory, x_refsource_MISC)
cve@mitre.org (Third Party Advisory, x_refsource_MISC)
cve@mitre.org (Third Party Advisory, x_refsource_MISC, Issue Tracking)
cve@mitre.org (Third Party Advisory, x_refsource_MISC)

Frequently asked questions

What is CVE-2018-8899?: CVE-2018-8899 is a medium-severity vulnerability in Identityserver Identityserver4, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2018-03-22.
How severe is CVE-2018-8899?: Medium severity. CVSS v3 base score is 6.1 out of 10.