Medium severity · published Sep 18, 2025
CVE-2025-10493
Chained Quiz <= 1.3.5 - Unauthenticated Insecure Direct Object Reference via Cookie
5.3
CVSS
0.9%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
Low
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.9% · higher than 60% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
CQ
Chained Quiz · prasunsen
through 1.3.5 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-10493
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-10493
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/
www.wordfence.com
https://www.wordfence.com/threat-intel/vulnerabilities/id/1d8f6965-1fe3-4f24-bd6b-9026e91bc5db?source=cve
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