What is CVE-2025-10493?

CVE-2025-10493 is a medium-severity vulnerability in Prasunsen Chained Quiz, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 5.3/10. Published 2025-09-18.

How severe is CVE-2025-10493?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Auth bypass in Prasunsen Chained Quiz

CVE-2025-10493

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.

Vulnerability class: IDOR (Insecure Direct Object Reference)

EPSS: 0.009 (54.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N.

Affected products

Prasunsen Chained Quiz — versions 0

Weakness classification (CWE)

CWE-639 — Authorization Bypass Through User-Controlled Key

References

Frequently asked questions

What is CVE-2025-10493?: CVE-2025-10493 is a medium-severity vulnerability in Prasunsen Chained Quiz, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 5.3/10. Published 2025-09-18.
How severe is CVE-2025-10493?: Medium severity. CVSS v3 base score is 5.3 out of 10.