ExtplorerApplication
CVE-2023-40628
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 · uneditedA reflected XSS vulnerability was discovered in the Extplorer component for Joomla.
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 confidenceA reflected Cross-Site Scripting (XSS) vulnerability exists in the Extplorer component for Joomla. The vulnerability allows attackers to inject malicious JavaScript code through unsanitized user input that gets reflected back in the application's response, potentially enabling session hijacking or credential theft when victims access crafted URLs.
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
ExtplorerApplication
>= 1.0.0, <= 2.1.5CVSS 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
- Changed
- Confidentiality
- Low
- Integrity
- Low
- Availability
- None
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/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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Confirm Extplorer is installedCheck the Joomla administrator extensions manager for the Extplorer component, or look for the /components/com_extplorer/ directory in the webrootAffected if Extplorer component is present on the Joomla installation
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Identify Extplorer versionCheck the version file in the Extplorer component directory (typically /components/com_extplorer/include/version.php) or view the extension details in Joomla administrator under Extensions > ManageAffected if The installed version falls within the range >= 1.0.0 and <= 2.1.5
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Verify if the component is accessibleAttempt to access the Extplorer component front-end via browser at /index.php?option=com_extplorer or check if the component is published and publicly accessible in Joomla content settingsAffected if The Extplorer component is enabled and accessible to users who could craft malicious URLs
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Inspect HTTP response for input reflectionSend a test request to the Extplorer component with a known parameter value (for example, add ?testparam=testvalue to the Extplorer URL) and examine if that value is reflected in the response without encodingAffected if User-supplied parameters are reflected in the response without proper HTML encoding
If Extplorer version is between 1.0.0 and 2.1.5 inclusive and the component is accessible, the environment is likely affected by this reflected XSS vulnerability.
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 dataUpgrade the Extplorer component to the latest version that includes the security patch, or implement proper input validation and output encoding for all user-supplied data rendered in the application's responses.
Fix this in Extplorer
Scoped from the published advisory
- Consultation2.0 h
- Implementation4.0 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 $2,560.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2023-40628 — 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-2023-40628 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