CVE-2025-10493
Chained Quiz <= 1.3.5 - Unauthenticated Insecure Direct Object Reference via Cookie
CVSS Score
5.3
EPSS Score
0.0%
EPSS Percentile
0th
The Chained Quiz plugin for WordPress is vulnerable to Insecure Direct Object Reference in version 1.3.4 and below via the quiz submission and completion mechanisms due to missing validation on a user controlled key. This makes it possible for unauthenticated attackers to hijack and modify other users' quiz attempts by manipulating the chained_completion_id cookie value, allowing them to alter quiz answers, scores, and results of any user. The vulnerability was partially patched in versions 1.3.4 and 1.3.5.
| CWE | CWE-639 |
| Vendor | prasunsen |
| Product | chained quiz |
| Published | Sep 18, 2025 |
| Last Updated | Apr 8, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Affected Versions
prasunsen / Chained Quiz
0 ≤ 1.3.5
References
wordfence.com: https://www.wordfence.com/threat-intel/vulnerabilities/id/1d8f6965-1fe3-4f24-bd6b-9026e91bc5db?source=cve plugins.trac.wordpress.org: https://plugins.trac.wordpress.org/browser/chained-quiz/tags/1.3.3/controllers/quizzes.php plugins.trac.wordpress.org: https://plugins.trac.wordpress.org/browser/chained-quiz/tags/1.3.3/models/quiz.php plugins.trac.wordpress.org: https://plugins.trac.wordpress.org/changeset/3362561/ plugins.trac.wordpress.org: https://plugins.trac.wordpress.org/changeset/3362701/ plugins.trac.wordpress.org: https://plugins.trac.wordpress.org/changeset/3362966/
Credits
Karuppiah Sabari Kumar