CVE-2026-5543
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 vulnerability was identified in PHPGurukul User Registration & Login and User Management System 3.3. The affected element is an unknown function of the file /admin/yesterday-reg-users.php. The manipulation of the argument ID leads to sql injection. Remote exploitation of the attack is possible. The exploit is publicly available and might be used.
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 the ID parameter of /admin/yesterday-reg-users.php in PHPGurukul User Registration & Login and User Management System 3.3. An attacker can inject malicious SQL queries through the unvalidated ID argument to access, modify, or delete database contents.
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
- Unchanged
- Confidentiality
- Low
- Integrity
- Low
- Availability
- Low
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
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 PHPGurukul User Registration & Login and User Management System is installedLocate the application by searching for typical PHPGurukul installation directories such as /var/www/html, /www, or C:\xampp\htdocs. Look for files like index.php, login.php, or admin/ directory containing user management functionality.Affected if The application directory structure matches PHPGurukul User Registration & Login and User Management System
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Verify the installed version is 3.3Check for a version file, footer in login.php or index.php, or any version.php included in the distribution. Compare your version string to 3.3.Affected if The installed version is 3.3
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Confirm the vulnerable file existsLocate the file /admin/yesterday-reg-users.php within the application directory. This file should exist in the admin folder.Affected if The file /admin/yesterday-reg-users.php is present on the server
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Inspect the ID parameter handling in the vulnerable fileOpen /admin/yesterday-reg-users.php and search for code that processes the ID parameter (such as $_GET['id'] or $_POST['id']). Look for direct inclusion of this parameter in SQL queries without prepared statements or sanitization functions.Affected if The file contains SQL queries that incorporate the ID parameter without parameterized queries or proper sanitization (e.g., mysqli_real_escape_string, prepared statements)
A system is affected if it runs PHPGurukul User Registration & Login and User Management System version 3.3 with the /admin/yesterday-reg-users.php file present and the ID parameter being used in unsanitized SQL queries.
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 dataReplace dynamic SQL queries with parameterized queries (prepared statements) and implement proper input validation on the ID parameter before executing any database operations.
- Consultation3.0 h
- Implementation4.0 h
- Testing3.0 h
- Review / QA2.0 h
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Free · runs locallyCheck whether your project pulls in CVE-2026-5543 — 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-2026-5543 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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- Version or environment caveats, and links to real fixes
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