Citrix ShareFile before 19.23 allows a downgrade from two-factor authentication to one-factor authentication.

published 2019-05-13 7y ago modified 2026-06-17 4mo ago also EUVD-2019-16762

cvss: 5.9; version 3.0, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 1.2%; EPSS 1.2% chance of exploitation in 30 days, percentile 69%
public exploits: 0; none known

Citrix ShareFile before 19.23 allows a downgrade from two-factor authentication to one-factor authentication. An attacker with access to the offline victim's otp physical token or virtual app (like google authenticator) is able to bypass the first authentication phase (username/password mechanism) and log-in using username/otp combination only (phase 2 of 2FA).

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Exploit prediction

1.23% chance of exploitation in the next 30 days, higher than 69% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

sk-it.com http://www.sk-it.com/en/cve.html referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
NVD	3.0	5.9	CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
NVD	2.0	4.3	AV:N/AC:M/Au:N/C:N/I:P/A:N

Classification

Weakness

CWE-287 Improper Authentication

References

sk-it.com /en/cve.html
exploit, third-party-advisory

Sources

CVE List CVE-2019-7218
NVD CVE-2019-7218

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