CVE-2026-3251
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 · uneditedImproper neutralization of input during web page generation ('cross-site scripting') vulnerability in Webremium Istanbul Web Design Mezunum Satiyorum allows Stored XSS. This issue affects Mezunum Satiyorum: from 1.2.504 through 10072026. NOTE: The vendor was contacted early about this disclosure but did not respond in any way.
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 Stored XSS vulnerability exists in the Mezunum Satiyorum component of Webremium Istanbul Web Design. User-supplied input is stored on the server and rendered in web pages without proper sanitization or output encoding, allowing attackers to inject malicious JavaScript that executes in the browsers of other users who view the affected content.
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
- Low
- User interaction
- None
- Scope
- Changed
- Confidentiality
- Low
- Integrity
- Low
- Availability
- None
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/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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Identify the Webremium installation and Mezunum Satiyorum componentInspect the web application file structure for the Mezunum Satiyorum component. Check the application's component manifest, modules directory, or source code for references to this component.Affected if The Mezunum Satiyorum component is present in the Webremium installation.
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Determine the installed version of the affected componentLocate version information in the component's metadata files, such as composer.json, package.json, a README file, or the component's main PHP/Python file. Compare this version to any publicly disclosed version information.Affected if A version number is found that matches or precedes the vulnerable version range (if published).
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Verify user input storage functionality existsLocate the code paths where the Mezunum Satiyorum component accepts and stores user-supplied data. Check for database insertion operations or storage mechanisms that persist user input.Affected if The component stores user-generated content in a database or file system.
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Inspect output rendering for stored dataFind the code that retrieves and displays stored user data in the Mezunum Satiyorum pages. Examine how the data is included in HTML responses - look for whether output encoding functions are used.Affected if Stored user data is rendered in HTML pages without visible evidence of sanitization or encoding functions (such as htmlspecialchars, htmlentities, or equivalent).
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Check for input validation on stored contentReview the data entry points where user input is accepted for storage. Look for validation routines that filter or reject script tags, event handlers, or other XSS vectors before storage.Affected if No input validation is performed on user-supplied content before storage, or validation can be bypassed.
If the Mezunum Satiyorum component is present and user-supplied content can be stored and displayed without proper sanitization or output encoding, the environment is affected by this Stored 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 dataImplement context-aware output encoding/escaping for all user-supplied data before rendering in HTML, combined with input validation at entry points. Additionally, deploy Content-Security-Policy headers to mitigate XSS execution.
- Consultation6.0 h
- Implementation12.0 h
- Testing8.0 h
- Review / QA4.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2026-3251 — 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-2026-3251 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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