CVE-2020-13998 is a user enumeration vulnerability affecting Citrix XenApp 6.5 when two-factor authentication (2FA) is enabled. An unauthenticated attacker can determine if a username is valid by observing differences in the 2FA error page response. This medium-severity vulnerability (CVSS 5.3) has a low impact, primarily disclosing user existence, and requires no user interaction. There is no evidence of active exploitation, public exploit code, or significant community discussion, and it affects an unsupported product.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
6.5.0.0CPE matchmatch criteria | cpe:2.3:a:citrix:xenapp:6.5.0.0:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.
Remediation records are not available for this CVE.