CVE-2019-11233: EXCELLENT INFOTEK BiYan v1.57 ~ v2.8 allows an attacker to leak user information without being authenticated,

This week

HIGH 7.5REMOTEUPGRADE

CVE-2019-11233 is a high-severity flaw (CVSS 7.5) affecting biyan. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

EXCELLENT INFOTEK BiYan v1.57 ~ v2.8 allows an attacker to leak user information without being authenticated, by sending a LOGIN_ID element to the auth/main/asp/check_user_login_info.aspx URI, and then reading the response, as demonstrated by the KW_EMAIL or KW_TEL field.

Why this priority

High severity
Public exploit reference
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.5% (top 26%)
CISA exploited list	No
Weakness	CWE-200
Published	2019-06-19
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: eic

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

Am I affected?

Timeline

2019-06-19 17:15 UTCPublished CVE record published
2026-06-17 02:12 UTCUpdated Record last modified

eic biyan UPGRADE

Affected: >= 1.57 and <= 2.8

Fixed in: newer than 2.8

Safe to downgrade to: a release before 1.57

1. Check installed version

apt-cache policy biyan || rpm -q biyan || biyan --version

2. UPGRADE to newer than 2.8 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade biyan

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade biyan

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 1.57 (Debian / Ubuntu)

apt-cache madison biyan sudo apt install biyan=<VERSION_BEFORE_1.57> sudo apt-mark hold biyan

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list biyan sudo dnf downgrade biyan-<VERSION_BEFORE_1.57> sudo dnf versionlock add biyan

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-2019-11233?

biyan: upgrade to newer than 2.8. Exact commands for each OS are on this page.

Is CVE-2019-11233 being exploited?

CVE-2019-11233 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-2019-11233 affect?

CVE-2019-11233 affects biyan. Severity is high (CVSS 7.5). EXCELLENT INFOTEK BiYan v1.57 ~ v2.8 allows an attacker to leak user information without being authenticated, by sending a LOGIN_ID element to the auth/main/asp/check_user_login_info.aspx URI, and then reading the response, as demonstrated

How urgent is CVE-2019-11233?

Priority 55/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

Related CVEs

CVE-2019-11232 CRITICAL 9.8 UPGRADE EXCELLENT INFOTEK BiYan v1.57 ~ v2.8 allows an attacker to leak user information (Password) without being auth

References

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