Typo3 ForumTYPO3 extension · Mittwald
CVE-2020-15513
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 · uneditedThe typo3_forum extension before 1.2.1 for TYPO3 has Incorrect Access Control.
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 · moderate confidenceThe typo3_forum extension for TYPO3 versions before 1.2.1 contains an Incorrect Access Control vulnerability. This allows users to potentially access resources or perform actions outside their intended permission levels due to improper authorization checks in the extension.
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
Typo3 ForumTYPO3 extension
< 1.2.1CVSS 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
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- Low
- Availability
- None
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
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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Verify typo3_forum extension is installedCheck your TYPO3 installation for the typo3_forum extension. In the TYPO3 backend, go to Admin Tools > Extensions > Extension Manager and search for 'typo3_forum'. Alternatively, check your project's composer.json file or the typo3conf/ext/ directory for the typo3_forum folder.Affected if The extension is present in your TYPO3 installation
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Determine installed version of typo3_forumIn the TYPO3 backend Extension Manager, click on the typo3_forum extension to view its details and version number. If using Composer, run 'composer show mittwald/typo3-forum' or check the version entry in your composer.lock file.Affected if The displayed version is lower than 1.2.1
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Confirm extension is loaded and activeIn the TYPO3 backend, verify that typo3_forum shows as active or loaded. Check the $GLOBALS['TYPO3_CONF_VARS']['EXT']['extConf']['typo3_forum'] configuration in typo3conf/LocalConfiguration.php or AdditionalConfiguration.php, or inspect the extension's state via the Extension Manager API.Affected if The extension is active and loaded in your TYPO3 system
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Review frontend/user group configurationSince this is an access control vulnerability, verify which frontend user groups have access to typo3_forum functionality. Check the extension's TypoScript setup and any defined user rights or group permissions within the extension's configuration.Affected if Users from lower-privilege groups can access content or actions meant for higher-privilege groups
Your environment is affected if the typo3_forum extension is installed, active, and its version is below 1.2.1.
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 data1.2.1
Update typo3_forum extension to version 1.2.1 or later to obtain the access control fix. If immediate update is not possible, consider disabling the extension until patched.
Fix this in Typo3 Forum
Scoped from the published advisory
- Consultation2.0 h
- Implementation1.0 h
- Testing3.0 h
- Review / QA2.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $2,224.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2020-15513 — 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-2020-15513 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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