CVE-2025-56556: An issue was discovered in Subrion CMS 4.2.1, allowing authenticated adminitrators or moderators with access t

Routine

LOW 3.8DOWNGRADE

CVE-2025-56556 is a low-severity flaw (CVSS 3.8) affecting subrion cms. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An issue was discovered in Subrion CMS 4.2.1, allowing authenticated adminitrators or moderators with access to the built-in Run SQL Query feature under the SQL Tool admin panel - to gain escalated privileges in the context of the SQL query tool.

Why this priority

Public exploit reference

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

Risk facts

CVSS score	3.8 (Low)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	High
User interaction	None
EPSS exploit chance	0.2% (top 90%)
CISA exploited list	No
Weakness	CWE-566
Published	2025-09-11
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: intelliants

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

Am I affected?

Timeline

2025-09-11 19:15 UTCPublished CVE record published
2026-06-17 09:42 UTCUpdated Record last modified

intelliants subrion cms DOWNGRADE

Affected: 4.2.1

Fixed in: no fixed release known

Safe to downgrade to: a release before 4.2.1

1. Check installed version

apt-cache policy subrion-cms || rpm -q subrion-cms || subrion-cms --version

2. No fixed release: DOWNGRADE to a release before 4.2.1 (Debian / Ubuntu)

apt-cache madison subrion-cms sudo apt install subrion-cms=<VERSION_BEFORE_4.2.1> sudo apt-mark hold subrion-cms

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

dnf --showduplicates list subrion-cms sudo dnf downgrade subrion-cms-<VERSION_BEFORE_4.2.1> sudo dnf versionlock add subrion-cms

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-2025-56556?

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

Is CVE-2025-56556 being exploited?

CVE-2025-56556 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-2025-56556 affect?

CVE-2025-56556 affects subrion cms. Severity is low (CVSS 3.8). An issue was discovered in Subrion CMS 4.2.1, allowing authenticated adminitrators or moderators with access to the built-in Run SQL Query feature under the SQL Tool admin panel - to gain escalated privileges in the context of the SQL query

How urgent is CVE-2025-56556?

Priority 21/100. Public exploit reference

Related CVEs

CVE-2025-70958 MEDIUM 6.1 DOWNGRADE Multiple reflected cross-site scripting (XSS) vulnerabilities in the installation module of Subrion CMS v4.2.1
CVE-2024-25399 MEDIUM 6.1 DOWNGRADE Subrion CMS 4.2.1 is vulnerable to Cross Site Scripting (XSS) via adminer.php.
CVE-2023-43875 MEDIUM 6.1 DOWNGRADE Multiple Cross-Site Scripting (XSS) vulnerabilities in installation of Subrion CMS v.4.2.1 allows a local atta

References

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