CVE-2025-10493 json
Chained Quiz <= 1.3.5 - Unauthenticated Insecure Direct Object Reference via Cookie
published last yr. modified 4mo ago also EUVD-2025-29846
- cvss
- 5.3
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.9%
- EPSS 0.9% chance of exploitation in 30 days, percentile 60%
- public exploits
- 1
- Exploit-DB
Summary
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.
Patch / fix
- kibokolabs chained_quiz 1.3.6
Is CVE-2025-10493 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.
Check with FencerTimeline
- Published
- First public exploit (EDB-52464)
CISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- partial
- Assessed
- last yr.
Exploit prediction
0.92% chance of exploitation in the next 30 days, higher than 60% of all scored CVEs (FIRST EPSS, 2026-11-11).
Exploits and checks
- EDB-52464 Chained Quiz 1.3.5 - Unauthenticated Insecure Direct Object Reference via Cookie webapps, 2025-12-25
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N |
Affected products
- prasunsen Chained Quiz
Classification
- Weakness
-
- CWE-639 Authorization Bypass Through User-Controlled Key
- Technology feeds
References
- wordfence.com /threat-intel/vulnerabilities/id/1d8f6965-1fe3-4f24-bd6b-9026e91bc5db?source=cve
- plugins.trac.wordpress.org /browser/chained-quiz/tags/1.3.3/controllers/quizzes.php
- plugins.trac.wordpress.org /browser/chained-quiz/tags/1.3.3/models/quiz.php
- plugins.trac.wordpress.org /changeset/3362561/
- plugins.trac.wordpress.org /changeset/3362701/
- plugins.trac.wordpress.org /changeset/3362966/
Sources
- CVE List CVE-2025-10493
- NVD CVE-2025-10493
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.
CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.