CVE-2023-53952: Dotclear 2.25.3 contains a remote code execution vulnerability that allows authenticated attackers to upload m

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HIGH 8.8DOWNGRADE

CVE-2023-53952 is a high-severity flaw (CVSS 8.8) affecting dotclear. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Dotclear 2.25.3 contains a remote code execution vulnerability that allows authenticated attackers to upload malicious PHP files with .phar extension through the blog post creation interface. Attackers can upload files containing PHP system commands that execute when the uploaded file is accessed, enabling arbitrary code execution on the server.

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	1.1% (top 34%)
CISA exploited list	No
Weakness	CWE-434
Published	2025-12-19
Last modified	2026-06-17

Publisher (CNA): VulnCheck · Vendor: dotclear

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

Am I affected?

Timeline

2025-12-19 21:15 UTCPublished CVE record published
2026-06-17 06:46 UTCUpdated Record last modified

dotclear dotclear DOWNGRADE

Affected: 2.25.3

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.25.3

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 2.25.3 (Debian / Ubuntu)

apt-cache madison dotclear sudo apt install dotclear=<VERSION_BEFORE_2.25.3> sudo apt-mark hold dotclear

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

dnf --showduplicates list dotclear sudo dnf downgrade dotclear-<VERSION_BEFORE_2.25.3> sudo dnf versionlock add dotclear

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-2023-53952?

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

Is CVE-2023-53952 being exploited?

CVE-2023-53952 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-2023-53952 affect?

CVE-2023-53952 affects dotclear. Severity is high (CVSS 8.8). Dotclear 2.25.3 contains a remote code execution vulnerability that allows authenticated attackers to upload malicious PHP files with .phar extension through the blog post creation interface. Attackers can upload files containing PHP system

How urgent is CVE-2023-53952?

Priority 52/100. High severity; Public exploit reference

Software pages

PHP vulnerabilities

Related CVEs

CVE-2024-58281 HIGH 8.8 DOWNGRADE Dotclear 2.29 contains a remote code execution vulnerability that allows authenticated attackers to upload mal

References

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