CVE-2021-26830
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 · uneditedSQL Injection in Tribalsystems Zenario CMS 8.8.52729 allows remote attackers to access the database or delete the plugin. This is accomplished via the `ID` input field of ajax.php in the `Pugin library - delete` module.
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 confidenceSQL injection vulnerability in Tribalsystems Zenario CMS 8.8.52729 allows remote attackers to inject malicious SQL queries through the unsanitized 'ID' parameter in the ajax.php file within the 'Plugin library - delete' module. This enables attackers to execute arbitrary SQL commands, potentially exfiltrating entire database contents or deleting critical plugin data.
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= 8.8.52729CVSS 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
- High
- Integrity
- High
- Availability
- None
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/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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Identify the Zenario CMS versionLocate the version file or admin panel that displays the installed Zenario CMS version number. This is typically found in the system information page or a version file within the CMS installation directory.Affected if The installed version is exactly 8.8.52729 (no other versions are affected per the specified range)
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Locate the ajax.php fileNavigate to the web root directory of the Zenario CMS installation and find the ajax.php file. This is the script mentioned as containing the vulnerable code path.Affected if The ajax.php file exists in the expected CMS directory structure
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Identify if the Plugin library - delete module is enabledAccess the Zenario CMS admin panel and check the module configuration or plugin settings. Look for the 'Plugin library - delete' module in the list of installed or enabled modules.Affected if The 'Plugin library - delete' module is installed and enabled in the CMS
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Verify the vulnerable parameter usageIf accessible, examine the ajax.php file or its included files to confirm the 'ID' parameter is processed without sanitization in the context of the Plugin library - delete functionality.Affected if The ID parameter in ajax.php (via Plugin library - delete) accepts user input without parameterized query handling
Your environment is affected if you have Zenario CMS version 8.8.52729 installed AND the 'Plugin library - delete' module is enabled and accessible via ajax.php.
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 dataApply vendor patches immediately; if unavailable, disable the affected 'Plugin library - delete' module or restrict access to ajax.php. Implement parameterized queries/prepared statements for all database operations in the affected code path.
- Consultation4.0 h
- Implementation6.0 h
- Testing4.0 h
- Review / QA3.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $4,832.
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Free · runs locallyCheck whether your project pulls in CVE-2021-26830 — 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-2021-26830 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