CVE-2025-10493 EXPLOIT
5.3
MEDIUM · CVSS 3.1 · EPSS 0.9% (pctl 59)
Patch early
A public exploit exists.
Description
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.
Scoring
| CVSS | 5.3 (MEDIUM, v3.1) |
|---|---|
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N |
| EPSS | 0.92% — more likely to be exploited than 59% of all CVEs |
| Weakness | CWE-639 |
| On CISA KEV | no |
| Public exploit | yes |
| Published | 2025-09-18 |
| Last modified | 2026-06-17 |
Public exploits
| Source | Title | Date |
|---|---|---|
| exploit-db | Chained Quiz 1.3.5 - Unauthenticated Insecure Direct Object Reference via Cookie | 2025-12-25 |
References
- https://plugins.trac.wordpress.org/browser/chained-quiz/tags/1.3.3/controllers/quizzes.php
- https://plugins.trac.wordpress.org/browser/chained-quiz/tags/1.3.3/models/quiz.php
- https://plugins.trac.wordpress.org/changeset/3362561/
- https://plugins.trac.wordpress.org/changeset/3362701/
- https://plugins.trac.wordpress.org/changeset/3362966/
- https://www.wordfence.com/threat-intel/vulnerabilities/id/1d8f6965-1fe3-4f24-bd6b-9026e91bc5db?source=cve
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