Joomla\!Application · Joomla
CVE-2020-10241
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 · uneditedAn issue was discovered in Joomla! before 3.9.16. Missing token checks in the image actions of com_templates lead to CSRF.
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 confidenceA Cross-Site Request Forgery vulnerability exists in Joomla! versions prior to 3.9.16 within the com_templates component's image actions. The missing anti-CSRF token validation allows authenticated administrators to be tricked into unknowingly executing malicious image manipulation requests via crafted links or forms.
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
Joomla\!Application
>= 3.2.0, < 3.9.16CVSS 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
- Required
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/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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Determine installed Joomla versionLog into the Joomla administrator dashboard and navigate to System > System Information, or check the libraries/joomla/version.php file in the Joomla installation directoryAffected if The displayed version falls within the range >= 3.2.0 and < 3.9.16
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Confirm template manager component presenceVerify that the com_templates component is installed by checking for the presence of the /administrator/components/com_templates/ directory in the Joomla installationAffected if The com_templates directory exists (this is a core component, so it should be present in any standard installation)
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Check administrator user accessReview the Joomla #__users table or navigate to Users > Manage in the administrator panel to identify if any user accounts have Super User or Administrator group assignmentsAffected if Any administrator-level accounts exist in the system, as the CSRF attack targets authenticated administrators
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Verify template image functionality accessibilityNavigate to Extensions > Templates > Templates in the administrator panel and attempt to access any template's image manager or image manipulation featuresAffected if The template image actions are accessible to authenticated administrators without token validation being enforced
A user is affected if their Joomla installation version is between 3.2.0 and 3.9.16 (inclusive of 3.2.0, exclusive of 3.9.16) and they have administrator accounts with access to the com_templates component.
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 data3.9.16
Upgrade to Joomla! version 3.9.16 or later which implements proper token validation for template image actions.
Fix this in Joomla\!
Scoped from the published advisory
- Consultation2.0 h
- Implementation2.0 h
- Testing2.0 h
- Review / QA1.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $1,984.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2020-10241 — 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-2020-10241 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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A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.
- 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
- No spam, self-promotion, credentials, or personal data