What is CVE-2020-13998?

CVE-2020-13998 is a medium-severity vulnerability in Citrix Xenapp, classified under Observable Discrepancy. CVSS score: 5.3/10. Published 2020-06-11.

How severe is CVE-2020-13998?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Is CVE-2020-13998 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Auth bypass in Citrix Xenapp

CVE-2020-13998

Citrix XenApp 6.5, when 2FA is enabled, allows a remote unauthenticated attacker to ascertain whether a user exists on the server, because the 2FA error page only occurs after a valid username is entered. NOTE: This vulnerability only affe…

EPSS: 0.014 (68.9th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.

Affected products

Citrix Xenapp — versions 6.5.0.0
N/a — versions n/a

Weakness classification (CWE)

Public proof-of-concept exploits

stratosphereips/nist-cve-search-tool

References

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

Frequently asked questions

What is CVE-2020-13998?: CVE-2020-13998 is a medium-severity vulnerability in Citrix Xenapp, classified under Observable Discrepancy. CVSS score: 5.3/10. Published 2020-06-11.
How severe is CVE-2020-13998?: Medium severity. CVSS v3 base score is 5.3 out of 10.
Is CVE-2020-13998 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.