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Critical, CVSS 9.2

baserCMS has OS command injection vulnerability in installer

CVE-2026-30880GHSA-6hpg-8rx3-cwgv

What to do

Vendor fix available. Upgrade each affected package to the fixed version on its release line (baserproject/basercms 5.2.3), redeploy, then verify what is actually installed.

This page has no inventory attached, so it cannot say whether you are affected. A vendor fix is not proof that your deployment is fixed.

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Affected packages

Sources

Severity and exploitation
Exploitation
No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.
CVSS 4.0
9.2 · CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N · score source
EPSS
  • CVE-2026-30880: 2.07% estimated exploitation activity in the next 30 days; percentile 81.44 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.
Source description

As published by the source; long descriptions are shortened.

baserCMS has an OS command injection vulnerability in the installer. Target baserCMS 5.2.2 and earlier versions Vulnerability If baserCMS is placed on a server but not installed, malicious commands may be executed. Countermeasures Update to the latest version of baserCMS Please refer to the following page to reference for more information. https://basercms.net/security/JVN54513170 Credits REN XINGDIAN

Dates and revisions
Published by the source
Last modified by the source
Source last checked
  1. Revision 1 · created ·

    Published from ghsa record GHSA-6hpg-8rx3-cwgv

Agent brief

Preview the exact text before you copy it. Commands are read-only suggestions; review them before running anything.

# Patch Next advisory brief: CVE-2026-30880

Advisory: baserCMS has OS command injection vulnerability in installer
IDs: CVE-2026-30880, GHSA-6hpg-8rx3-cwgv
Record: https://patchnext.com/advisories/cve-2026-30880 (revision 1, source checked 26 Oct 2026, 14:39 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Critical (CVSS 9.2)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: baserproject/basercms 5.2.3. A vendor fix does not mean a deployment is fixed.

## Affected components
- Packagist baserproject/basercms: affected <= 5.2.2; fixed in 5.2.3

## Suggested inspection (read-only)
- Packagist baserproject/basercms: check the installed version with your package manager.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on baserproject/basercms.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://github.com/advisories/GHSA-6hpg-8rx3-cwgv (GitHub-reviewed advisory GHSA-6hpg-8rx3-cwgv lists affected ranges: Packagist baserproject/basercms >=0 <=5.2.2)

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