CVE-2025-59899: Sync Breeze Enterprise Server v10.4.18 and Disk Pulse Enterprise v10.4.18 contain a persistent authenticated C

Routine

MEDIUM 5.4DOWNGRADEDOWNGRADE

CVE-2025-59899 is a medium-severity flaw (CVSS 5.4) affecting diskpulse, syncbreeze. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Sync Breeze Enterprise Server v10.4.18 and Disk Pulse Enterprise v10.4.18 contain a persistent authenticated Cross-Site Scripting (XSS) vulnerability. An attacker could send malicious content to an authenticated user and steal information from their session due to insufficient validation of user input in '/server_options?sid=', affecting the 'tasks_logs_dir', 'errors_logs_dir', 'error_notifications_address', 'status_notifications_address', and '

Why this priority

No elevated risk signals yet

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

Risk facts

CVSS score	5.4 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	Required
EPSS exploit chance	0.2% (top 91%)
CISA exploited list	No
Weakness	CWE-79
Published	2026-01-28
Last modified	2026-06-17

Publisher (CNA): Spanish National Cybersecurity Institute, S.A. (INCIBE) · Vendor: flexense

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

Am I affected?

Timeline

2026-01-28 12:15 UTCPublished CVE record published
2026-06-17 09:46 UTCUpdated Record last modified

flexense diskpulse DOWNGRADE

Affected: 10.4.18

Fixed in: no fixed release known

Safe to downgrade to: a release before 10.4.18

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 10.4.18 (Debian / Ubuntu)

apt-cache madison diskpulse sudo apt install diskpulse=<VERSION_BEFORE_10.4.18> sudo apt-mark hold diskpulse

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

dnf --showduplicates list diskpulse sudo dnf downgrade diskpulse-<VERSION_BEFORE_10.4.18> sudo dnf versionlock add diskpulse

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.

flexense syncbreeze DOWNGRADE

Affected: 10.4.18

Fixed in: no fixed release known

Safe to downgrade to: a release before 10.4.18

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 10.4.18 (Debian / Ubuntu)

apt-cache madison syncbreeze sudo apt install syncbreeze=<VERSION_BEFORE_10.4.18> sudo apt-mark hold syncbreeze

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

dnf --showduplicates list syncbreeze sudo dnf downgrade syncbreeze-<VERSION_BEFORE_10.4.18> sudo dnf versionlock add syncbreeze

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-2025-59899?

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

Is CVE-2025-59899 being exploited?

CVE-2025-59899 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-2025-59899 affect?

CVE-2025-59899 affects diskpulse, syncbreeze. Severity is medium (CVSS 5.4). Sync Breeze Enterprise Server v10.4.18 and Disk Pulse Enterprise v10.4.18 contain a persistent authenticated Cross-Site Scripting (XSS) vulnerability. An attacker could send malicious content to an authenticated user and steal information f

How urgent is CVE-2025-59899?

Priority 21/100. No elevated risk signals yet.

Related CVEs

CVE-2025-59900 MEDIUM 5.4 DOWNGRADE DOWNGRADE Sync Breeze Enterprise Server v10.4.18 and Disk Pulse Enterprise v10.4.18 contain a persistent authenticated C
CVE-2025-59898 MEDIUM 5.4 DOWNGRADE DOWNGRADE Sync Breeze Enterprise Server v10.4.18 and Disk Pulse Enterprise v10.4.18 contain a persistent authenticated C
CVE-2025-59897 MEDIUM 5.4 DOWNGRADE DOWNGRADE Sync Breeze Enterprise Server v10.4.18 and Disk Pulse Enterprise v10.4.18 contain a persistent authenticated C
CVE-2025-59896 MEDIUM 5.4 DOWNGRADE DOWNGRADE Sync Breeze Enterprise Server v10.4.18 and Disk Pulse Enterprise v10.4.18 contain a persistent authenticated C
CVE-2025-59895 HIGH 7.5 DOWNGRADE DOWNGRADE Sync Breeze Enterprise Server v10.4.18 and Disk Pulse Enterprise v10.4.18 contain a remote denial-of-service (

References

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