CVE-2020-25803
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedImproper Control of Dynamically-Managed Code Resources vulnerability in Crafter Studio of Crafter CMS allows authenticated developers to execute OS commands via FreeMarker template exposed objects. This issue affects: Crafter Software Crafter CMS 3.0 versions prior to 3.0.27; 3.1 versions prior to 3.1.7.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · high confidenceCommand injection vulnerability in Crafter Studio's FreeMarker template engine allows authenticated developers to execute arbitrary OS commands through improperly secured template exposed objects. The vulnerability stems from insufficient controls over dynamically-managed code resources in the templating system.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.
NVD · CPE data>= 3.0.0, < 3.0.27>= 3.1.0, < 3.1.7CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Network
- Complexity
- Low
- Privileges
- High
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
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Identify Crafter Studio installation and versionCheck the Crafter Studio version by examining the startup logs, the about page in the Crafter Studio UI, or the version file in the installation directory (such as VERSION.txt or in the pom.xml of the studio WAR).Affected if The installed version falls within >= 3.0.0 and < 3.0.27, or >= 3.1.0 and < 3.1.7.
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Confirm FreeMarker templating is in useVerify that Crafter Studio is configured to use FreeMarker templates for content rendering. This is the default configuration. Check studio configuration files (such as studio-config-overrides.xml or the web.xml) for FreeMarker servlet configuration.Affected if FreeMarker templating is enabled, which is the default state for Crafter CMS.
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Verify developer-level access existsDetermine if there are users with developer or site administrator roles in Crafter Studio. These roles have access to the templating system. Check user role assignments in the Crafter Studio admin console or users.xml configuration.Affected if Authenticated users with developer or template authoring privileges exist in the system.
The environment is affected if Crafter Studio version is 3.0.0 through 3.0.26, or 3.1.0 through 3.1.6, and FreeMarker templating with developer access is in use.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
From vendor data3.0.273.1.7
Upgrade Crafter CMS to version 3.0.27 or later (for 3.0.x branches) or 3.1.7 or later (for 3.1.x branches) to obtain the patched code that properly restricts template object access.
- Consultation4.0 h
- Implementation8.0 h
- Testing8.0 h
- Review / QA4.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2020-25803 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2020-25803 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
- No weaponised exploit code, or anything meant to cause harm
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