CVE-2021-39433: A local file inclusion (LFI) vulnerability exists in version BIQS IT Biqs-drive v1.83 and below when sending a

Q: How do I fix CVE-2021-39433?

biqsdrive: upgrade to newer than 1.83. Exact commands for each OS are on this page.

Q: Is CVE-2021-39433 being exploited?

CVE-2021-39433 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2021-39433 affect?

CVE-2021-39433 affects biqsdrive. Severity is high (CVSS 7.5). A local file inclusion (LFI) vulnerability exists in version BIQS IT Biqs-drive v1.83 and below when sending a specific payload as the file parameter to download/index.php. This allows the attacker to read arbitrary files from the server wi

Q: How urgent is CVE-2021-39433?

Priority 60/100. High severity; EPSS top 5%: very likely to be exploited; Public exploit reference; Remotely exploitable, no login, no user action

This week

HIGH 7.5REMOTEUPGRADE

CVE-2021-39433 is a high-severity flaw (CVSS 7.5) affecting biqsdrive. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A local file inclusion (LFI) vulnerability exists in version BIQS IT Biqs-drive v1.83 and below when sending a specific payload as the file parameter to download/index.php. This allows the attacker to read arbitrary files from the server with the permissions of the configured web-user.

Why this priority

High severity
EPSS top 5%: very likely to be exploited
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	8.7% (top 5%)
CISA exploited list	No
Published	2021-10-04
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: biqs

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

Am I affected?

Timeline

2021-10-04 20:15 UTCPublished CVE record published
2026-06-17 04:03 UTCUpdated Record last modified

biqs biqsdrive UPGRADE

Affected: <= 1.83

Fixed in: newer than 1.83

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to newer than 1.83 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade biqsdrive

Note

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

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Nuclei scan template: BIQS IT Biqs-drive v1.83 Local File Inclusion

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-2021-39433?

biqsdrive: upgrade to newer than 1.83. Exact commands for each OS are on this page.

Is CVE-2021-39433 being exploited?

CVE-2021-39433 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-2021-39433 affect?

CVE-2021-39433 affects biqsdrive. Severity is high (CVSS 7.5). A local file inclusion (LFI) vulnerability exists in version BIQS IT Biqs-drive v1.83 and below when sending a specific payload as the file parameter to download/index.php. This allows the attacker to read arbitrary files from the server wi

How urgent is CVE-2021-39433?

Priority 60/100. High severity; EPSS top 5%: very likely to be exploited; Public exploit reference; Remotely exploitable, no login, no user action

Software pages

PHP vulnerabilities

References

← Back to latest CVEs