CVE-2025-65518: Plesk Obsidian versions 8.0.1 through 18.0.73 are vulnerable to a Denial of Service (DoS) condition

This month

HIGH 7.5REMOTEUPGRADE

CVE-2025-65518 is a high-severity flaw (CVSS 7.5) affecting plesk obsidian. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Plesk Obsidian versions 8.0.1 through 18.0.73 are vulnerable to a Denial of Service (DoS) condition. The vulnerability exists in the get_password.php endpoint, where a crafted request containing a malicious payload can cause the affected web interface to continuously reload, rendering the service unavailable to legitimate users. An attacker can exploit this issue remotely without authentication, resulting in a persistent availability impact on th

Why this priority

High severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.6% (top 51%)
CISA exploited list	No
Weakness	CWE-400, CWE-606
Published	2026-01-08
Last modified	2026-07-15

Publisher (CNA): MITRE · Vendor: webpros

Last updated 2026-07-15 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-01-08 19:15 UTCPublished CVE record published
2026-07-15 02:17 UTCUpdated Record last modified

webpros plesk obsidian UPGRADE

Affected: >= 8.0.1 and < 18.0.73

Fixed in: 18.0.73

Safe to downgrade to: a release before 8.0.1

1. Check installed version

apt-cache policy plesk-obsidian || rpm -q plesk-obsidian || plesk-obsidian --version

2. UPGRADE to 18.0.73 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade plesk-obsidian

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade plesk-obsidian

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 8.0.1 (Debian / Ubuntu)

apt-cache madison plesk-obsidian sudo apt install plesk-obsidian=<VERSION_BEFORE_8.0.1> sudo apt-mark hold plesk-obsidian

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list plesk-obsidian sudo dnf downgrade plesk-obsidian-<VERSION_BEFORE_8.0.1> sudo dnf versionlock add plesk-obsidian

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-2025-65518?

plesk obsidian: upgrade to 18.0.73. Exact commands for each OS are on this page.

Is CVE-2025-65518 being exploited?

CVE-2025-65518 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-2025-65518 affect?

CVE-2025-65518 affects plesk obsidian. Severity is high (CVSS 7.5). Plesk Obsidian versions 8.0.1 through 18.0.73 are vulnerable to a Denial of Service (DoS) condition. The vulnerability exists in the get_password.php endpoint, where a crafted request containing a malicious payload can cause the affected we

How urgent is CVE-2025-65518?

Priority 44/100. High severity; Remotely exploitable, no login, no user action

Software pages

PHP vulnerabilities

References

← Back to latest CVEs