CVE-2024-33423: Cross-Site Scripting (XSS) vulnerability in the Settings menu of CMSimple v5.15 allows attackers to execute ar

This month

HIGH 7.4DOWNGRADE

CVE-2024-33423 is a high-severity flaw (CVSS 7.4) affecting cmsimple. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Cross-Site Scripting (XSS) vulnerability in the Settings menu of CMSimple v5.15 allows attackers to execute arbitrary web scripts or HTML via a crafted payload injected into the Logout parameter under the Language section.

Why this priority

High severity
Public exploit reference

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

Risk facts

CVSS score	7.4 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.6% (top 54%)
CISA exploited list	No
Weakness	CWE-80
Published	2024-05-01
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: cmsimple

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

Am I affected?

Timeline

2024-05-01 20:15 UTCPublished CVE record published
2026-06-17 07:31 UTCUpdated Record last modified

cmsimple cmsimple DOWNGRADE

Affected: 5.15

Fixed in: no fixed release known

Safe to downgrade to: a release before 5.15

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 5.15 (Debian / Ubuntu)

apt-cache madison cmsimple sudo apt install cmsimple=<VERSION_BEFORE_5.15> sudo apt-mark hold cmsimple

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

dnf --showduplicates list cmsimple sudo dnf downgrade cmsimple-<VERSION_BEFORE_5.15> sudo dnf versionlock add cmsimple

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-2024-33423?

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

Is CVE-2024-33423 being exploited?

CVE-2024-33423 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-2024-33423 affect?

CVE-2024-33423 affects cmsimple. Severity is high (CVSS 7.4). Cross-Site Scripting (XSS) vulnerability in the Settings menu of CMSimple v5.15 allows attackers to execute arbitrary web scripts or HTML via a crafted payload injected into the Logout parameter under the Language section.

How urgent is CVE-2024-33423?

Priority 43/100. High severity; Public exploit reference

Related CVEs

CVE-2024-58280 HIGH 8.8 DOWNGRADE CMSimple 5.15 contains a remote command execution vulnerability that allows authenticated attackers to modify
CVE-2024-57549 HIGH 7.5 DOWNGRADE CMSimple 5.16 allows the user to read cms source code through manipulation of the file name in the file parame
CVE-2024-57548 CRITICAL 9.1 DOWNGRADE CMSimple 5.16 allows the user to edit log.php file via print page.
CVE-2024-57547 HIGH 7.5 DOWNGRADE Insecure Permissions vulnerability in CMSimple v.5.16 allows a remote attacker to obtain sensitive information
CVE-2024-57546 HIGH 7.5 DOWNGRADE An issue in CMSimple v.5.16 allows a remote attacker to obtain sensitive information via a crafted script to t

References

← Back to latest CVEs