CVE-2019-17120: A stored and reflected cross-site scripting (XSS) vulnerability in WiKID 2FA Enterprise Server through 4.2.0-b

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MEDIUM 6.1DOWNGRADE

CVE-2019-17120 is a medium-severity flaw (CVSS 6.1) affecting 2fa enterprise server. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A stored and reflected cross-site scripting (XSS) vulnerability in WiKID 2FA Enterprise Server through 4.2.0-b2047 allow remote attackers to inject arbitrary web script or HTML via /WiKIDAdmin/adm_usrs.jsp. The usr parameter is vulnerable: the reflected cross-site scripting occurs immediately after the user is created. The malicious script is stored and will be executed whenever /WiKIDAdmin/adm_usrs.jsp is visited.

Why this priority

EPSS top 1%: very likely to be exploited
Public exploit reference

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	6.1 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	48.9% (top 1%)
CISA exploited list	No
Weakness	CWE-79
Published	2019-10-17
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: wikidsystems

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2019-10-17 19:15 UTCPublished CVE record published
2026-06-17 02:23 UTCUpdated Record last modified

wikidsystems 2fa enterprise server DOWNGRADE

Affected: 3.4.81 b676 · 3.4.85 b780 · 3.4.87 b1092 · 3.4.87 b1159 · 3.4.87 b1169 · 3.4.87 b1216 · 3.4.87 b824 · 3.4.87 b839

Fixed in: no fixed release known

Safe to downgrade to: a release before 3.4.81

1. Check installed version

apt-cache policy 2fa-enterprise-server || rpm -q 2fa-enterprise-server || 2fa-enterprise-server --version

2. No fixed release: DOWNGRADE to a release before 3.4.81 (Debian / Ubuntu)

apt-cache madison 2fa-enterprise-server sudo apt install 2fa-enterprise-server=<VERSION_BEFORE_3.4.81> sudo apt-mark hold 2fa-enterprise-server

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list 2fa-enterprise-server sudo dnf downgrade 2fa-enterprise-server-<VERSION_BEFORE_3.4.81> sudo dnf versionlock add 2fa-enterprise-server

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2019-17120?

2fa enterprise server: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2019-17120 being exploited?

CVE-2019-17120 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2019-17120 affect?

CVE-2019-17120 affects 2fa enterprise server. Severity is medium (CVSS 6.1). A stored and reflected cross-site scripting (XSS) vulnerability in WiKID 2FA Enterprise Server through 4.2.0-b2047 allow remote attackers to inject arbitrary web script or HTML via /WiKIDAdmin/adm_usrs.jsp. The usr parameter is vulnerable:

How urgent is CVE-2019-17120?

Priority 51/100. EPSS top 1%: very likely to be exploited; Public exploit reference

Related CVEs

CVE-2019-17118 HIGH 8.8 DOWNGRADE A CSRF issue in WiKID 2FA Enterprise Server through 4.2.0-b2053 allows a remote attacker to trick an authentic
CVE-2019-17117 HIGH 8.8 DOWNGRADE A SQL injection vulnerability in processPref.jsp in WiKID 2FA Enterprise Server through 4.2.0-b2053 allows an

References

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