CVE-2023-0840: A vulnerability classified as problematic was found in PHPCrazy 1.1.1

Routine

LOW 3.5DOWNGRADE

CVE-2023-0840 is a low-severity flaw (CVSS 3.5) affecting phpcrazy. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A vulnerability classified as problematic was found in PHPCrazy 1.1.1. This vulnerability affects unknown code of the file admin/admin.php?action=users&mode=info&user=2. The manipulation of the argument username leads to cross site scripting. The attack can be initiated remotely. The exploit has been disclosed to the public and may be used. VDB-221086 is the identifier assigned to this vulnerability.

Why this priority

No elevated risk signals yet

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

Risk facts

CVSS score	3.5 (Low)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	Required
EPSS exploit chance	0.6% (top 50%)
CISA exploited list	No
Weakness	CWE-79
Published	2023-02-15
Last modified	2026-06-17

Publisher (CNA): VulDB · Vendor: phpcrazy project

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

Am I affected?

Timeline

2023-02-15 14:15 UTCPublished CVE record published
2026-06-17 05:26 UTCUpdated Record last modified

phpcrazy project phpcrazy DOWNGRADE

Affected: 1.1.1

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.1.1

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 1.1.1 (Debian / Ubuntu)

apt-cache madison phpcrazy sudo apt install phpcrazy=<VERSION_BEFORE_1.1.1> sudo apt-mark hold phpcrazy

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

dnf --showduplicates list phpcrazy sudo dnf downgrade phpcrazy-<VERSION_BEFORE_1.1.1> sudo dnf versionlock add phpcrazy

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-2023-0840?

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

Is CVE-2023-0840 being exploited?

CVE-2023-0840 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-2023-0840 affect?

CVE-2023-0840 affects phpcrazy. Severity is low (CVSS 3.5). A vulnerability classified as problematic was found in PHPCrazy 1.1.1. This vulnerability affects unknown code of the file admin/admin.php?action=users&mode=info&user=2. The manipulation of the argument username leads to cross site scriptin

How urgent is CVE-2023-0840?

Priority 25/100. No elevated risk signals yet.

Software pages

PHP vulnerabilities

References

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