CVE-2023-53868: Coppermine Gallery 1.6.25 contains a remote code execution vulnerability that allows authenticated attackers t

This month

HIGH 8.8DOWNGRADE

CVE-2023-53868 is a high-severity flaw (CVSS 8.8) affecting coppermine photo gallery. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Coppermine Gallery 1.6.25 contains a remote code execution vulnerability that allows authenticated attackers to upload malicious PHP files through the plugin manager. Attackers can upload a zipped PHP file with system commands to the plugin directory and execute arbitrary code by accessing the uploaded plugin script.

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 42%)
CISA exploited list	No
Weakness	CWE-434
Published	2025-12-15
Last modified	2026-06-17

Publisher (CNA): VulnCheck · Vendor: coppermine-gallery

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

Am I affected?

Timeline

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

coppermine-gallery coppermine photo gallery DOWNGRADE

Affected: 1.6.25

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.6.25

1. Check installed version

apt-cache policy coppermine-photo-gallery || rpm -q coppermine-photo-gallery || coppermine-photo-gallery --version

2. No fixed release: DOWNGRADE to a release before 1.6.25 (Debian / Ubuntu)

apt-cache madison coppermine-photo-gallery sudo apt install coppermine-photo-gallery=<VERSION_BEFORE_1.6.25> sudo apt-mark hold coppermine-photo-gallery

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

dnf --showduplicates list coppermine-photo-gallery sudo dnf downgrade coppermine-photo-gallery-<VERSION_BEFORE_1.6.25> sudo dnf versionlock add coppermine-photo-gallery

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-2023-53868?

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

Is CVE-2023-53868 being exploited?

CVE-2023-53868 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-2023-53868 affect?

CVE-2023-53868 affects coppermine photo gallery. Severity is high (CVSS 8.8). Coppermine Gallery 1.6.25 contains a remote code execution vulnerability that allows authenticated attackers to upload malicious PHP files through the plugin manager. Attackers can upload a zipped PHP file with system commands to the plugin

How urgent is CVE-2023-53868?

Priority 50/100. High severity; Public exploit reference

Software pages

PHP vulnerabilities

References

← Back to latest CVEs