CVE-2024-31012: An issue was discovered in SEMCMS v.4.8, allows remote attackers to execute arbitrary code, escalate privilege

This week

CRITICAL 9.8REMOTEDOWNGRADE

CVE-2024-31012 is a critical-severity flaw (CVSS 9.8) affecting semcms. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An issue was discovered in SEMCMS v.4.8, allows remote attackers to execute arbitrary code, escalate privileges, and obtain sensitive information via the upload.php file.

Why this priority

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

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

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.2% (top 33%)
CISA exploited list	No
Weakness	CWE-434
Published	2024-04-03
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: sem-cms

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

Am I affected?

Timeline

2024-04-03 04:15 UTCPublished CVE record published
2026-06-17 07:27 UTCUpdated Record last modified

sem-cms semcms DOWNGRADE

Affected: 4.8

Fixed in: no fixed release known

Safe to downgrade to: a release before 4.8

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 4.8 (Debian / Ubuntu)

apt-cache madison semcms sudo apt install semcms=<VERSION_BEFORE_4.8> sudo apt-mark hold semcms

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

dnf --showduplicates list semcms sudo dnf downgrade semcms-<VERSION_BEFORE_4.8> sudo dnf versionlock add semcms

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-2024-31012?

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

Is CVE-2024-31012 being exploited?

CVE-2024-31012 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-2024-31012 affect?

CVE-2024-31012 affects semcms. Severity is critical (CVSS 9.8). An issue was discovered in SEMCMS v.4.8, allows remote attackers to execute arbitrary code, escalate privileges, and obtain sensitive information via the upload.php file.

How urgent is CVE-2024-31012?

Priority 61/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action

Software pages

PHP vulnerabilities

Related CVEs

CVE-2024-32409 HIGH 7.1 DOWNGRADE An issue in SEMCMS v.4.8 allows a remote attacker to execute arbitrary code via a crafted script.
CVE-2025-51660 MEDIUM 5.4 UPGRADE SemCms v5.0 was discovered to contain a SQL injection vulnerability via the lgid parameter at SEMCMS_Products.
CVE-2025-51659 MEDIUM 5.4 UPGRADE SemCms v5.0 was discovered to contain a SQL injection vulnerability via the ID parameter at SEMCMS_Products.ph
CVE-2025-51658 MEDIUM 5.4 UPGRADE SemCms v5.0 was discovered to contain a SQL injection vulnerability via the ID parameter at SEMCMS_InquiryView
CVE-2025-51657 MEDIUM 5.4 UPGRADE SemCms v5.0 was discovered to contain a SQL injection vulnerability via the lgid parameter at SEMCMS_Link.php.

References

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