CVE-2026-57833
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 · uneditedJoomla Extension - weeblr.com - Unauthenticated stored XSS in 4Analytics < 5.0.2 - The Joomla extension 4Analytics is vulnerable to an unauthenticated stored XSS in relation to the AI analysis feature.
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 4Analytics Joomla extension from weeblr.com contains an unauthenticated stored XSS vulnerability in its AI analysis feature affecting versions prior to 5.0.2. Attackers can inject malicious JavaScript that persists on the server and executes when users view affected content, potentially leading to session hijacking or credential theft.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
CVSS 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
- Authentication
- X
- User interaction
- A
- Scope
- X
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
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 4Analytics extension is installedCheck the Joomla administrator extensions manager for '4Analytics' or inspect the /plugins/system/ or /administrator/manifests/ directories for weeblr/4analytics-related filesAffected if The 4Analytics extension from weeblr.com is present in the Joomla installation
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Determine installed 4Analytics versionView the extension details in Joomla extension manager or check the manifest.xml file within the 4Analytics plugin directory for the version attributeAffected if The installed version is lower than 5.0.2 (e.g., 5.0.1, 4.x.x, etc.)
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Confirm AI analysis feature is enabledAccess the 4Analytics configuration settings in Joomla admin and verify whether the AI analysis feature toggle is turned on, or check the extension's config.xml for the relevant settingAffected if The AI analysis feature is active/enabled in the extension configuration
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Inspect stored data in AI analysis moduleQuery the database tables associated with 4Analytics (look for tables prefixed with #__weeblr or related to the AI analysis feature) or examine any frontend components that render AI analysis output for unsanitized script tagsAffected if Malicious JavaScript or HTML tags (script, iframe, img onerror, etc.) are present in AI analysis-related database fields
You are affected if the 4Analytics extension is installed with a version prior to 5.0.2 AND the AI analysis feature is enabled, regardless of whether malicious content is yet visible.
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 to version 5.0.2 or later. If upgrade is not immediately possible, disable the 4Analytics extension or restrict access to the AI analysis feature via web server rules until the patch can be applied.
- Consultation3.0 h
- Implementation2.0 h
- Testing3.0 h
- Review / QA2.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2026-57833 — 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-2026-57833 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
- No spam, self-promotion, credentials, or personal data