CVE-2023-33601: An arbitrary file upload vulnerability in /admin.php?c=upload of phpok v6.4.100 allows attackers to execute ar

This month

HIGH 8.8DOWNGRADE

CVE-2023-33601 is a high-severity flaw (CVSS 8.8) affecting phpok. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An arbitrary file upload vulnerability in /admin.php?c=upload of phpok v6.4.100 allows attackers to execute arbitrary code via a crafted PHP file.

Why this priority

High severity
Public exploit reference

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

Risk facts

CVSS score	8.8 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.9% (top 39%)
CISA exploited list	No
Weakness	CWE-434
Published	2023-06-07
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: phpok

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

Am I affected?

Timeline

2023-06-07 02:15 UTCPublished CVE record published
2026-06-17 06:01 UTCUpdated Record last modified

phpok phpok DOWNGRADE

Affected: 6.4.100

Fixed in: no fixed release known

Safe to downgrade to: a release before 6.4.100

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 6.4.100 (Debian / Ubuntu)

apt-cache madison phpok sudo apt install phpok=<VERSION_BEFORE_6.4.100> sudo apt-mark hold phpok

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

dnf --showduplicates list phpok sudo dnf downgrade phpok-<VERSION_BEFORE_6.4.100> sudo dnf versionlock add phpok

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-2023-33601?

phpok: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2023-33601 being exploited?

CVE-2023-33601 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-2023-33601 affect?

CVE-2023-33601 affects phpok. Severity is high (CVSS 8.8). An arbitrary file upload vulnerability in /admin.php?c=upload of phpok v6.4.100 allows attackers to execute arbitrary code via a crafted PHP file.

How urgent is CVE-2023-33601?

Priority 51/100. High severity; Public exploit reference

Software pages

PHP vulnerabilities

Related CVEs

CVE-2024-44867 HIGH 7.5 DOWNGRADE phpok v3.0 was discovered to contain an arbitrary file read vulnerability via the component /autoload/file.php
CVE-2024-38953 MEDIUM 6.1 DOWNGRADE phpok 6.4.003 contains a Cross Site Scripting (XSS) vulnerability in the ok_f() method under the framework/api
CVE-2023-2888 MEDIUM 4.7 DOWNGRADE A vulnerability, which was classified as problematic, was found in PHPOK 6.4.100
CVE-2023-29881 MEDIUM 6.5 DOWNGRADE phpok 6.4.003 is vulnerable to SQL injection in the function index_f() in phpok64/framework/api/call_control.p
CVE-2022-47129 CRITICAL 9.8 DOWNGRADE PHPOK v6.3 was discovered to contain a remote code execution (RCE) vulnerability.

References

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