CVE-2021-42597
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 Cross Site Scripting (XSS) vulnerability exists in Sourcecodester Storage Unit Rental Management System PHP 8.0.10 , Apache 2.4.14, SURMS V 1.0 via the Add New Tenant List Rent List form.
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 stored Cross Site Scripting (XSS) vulnerability exists in the Storage Unit Rental Management System V 1.0, specifically in the 'Add New Tenant List Rent List' form. User-supplied input in form fields is not properly sanitized or escaped before being stored and rendered, allowing injection of malicious script code that executes in the browser of other users viewing the tenant/rent list.
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= 1.0CVSS 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
- Required
- Scope
- Changed
- Confidentiality
- Low
- Integrity
- Low
- Availability
- None
CVSS:3.1/AV:N/AC:L/PR:L/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 the application versionLocate and identify the Storage Unit Rental Management System installation. Check for version identifier '1.0' in the application UI, about page, or source files.Affected if The installed version is Storage Unit Rental Management System 1.0
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Verify the tenant list feature existsNavigate to or locate the 'Add New Tenant List Rent List' form within the application interface.Affected if The 'Add New Tenant List Rent List' form is present and accessible in the application
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Check for input sanitization in tenant formsExamine the application source code or behavior when submitting the tenant/rent list form. Look for how form inputs (name, address, payment details, etc.) are handled before being stored in the database.Affected if Form field inputs are stored directly to the database without sanitization or encoding
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Verify output encoding when displaying tenant dataAccess the tenant/rent list page to view stored data. Inspect how previously entered data is rendered in the browser.Affected if Stored tenant data is displayed in the browser without proper output encoding or escaping
If running Storage Unit Rental Management System version 1.0 and the tenant list feature is accessible, the application is vulnerable to stored XSS in the Add New Tenant List Rent List form.
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 output encoding and input validation/sanitization on all form fields in the tenant list functionality. Apply context-appropriate encoding when displaying user input and consider implementing a Content Security Policy (CSP) header as a defense-in-depth measure.
- Consultation2.0 h
- Implementation4.0 h
- Testing3.0 h
- Review / QA1.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2021-42597 — 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-2021-42597 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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