What is CVE-2026-12271?

CVE-2026-12271 is a medium-severity vulnerability in Tutor Lms, classified under CWE-639 AUTHORIZATION BYPASS THROUGH USER-CONTROLLED KEY. CVSS score: 5.4/10. Published 2026-07-13.

How severe is CVE-2026-12271?

Medium severity. CVSS v3 base score is 5.4 out of 10.

Vulnerability in Tutor Lms

CVE-2026-12271

The Tutor LMS WordPress plugin before 3.9.13 does not verify ownership of the targeted quiz attempt before writing to it, allowing authenticated users with subscriber-level access and above to modify and force-complete other students' quiz attempts, overwriting their recorded marks and pass/fail result.

Published 2026-07-13 · last modified 2026-07-13.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L.

EPSS exploit prediction

EPSS: 0.003 (19.6th percentile), scored 2026-10-12.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 20th percentile — 19.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000

Affected products

Tutor Lms — versions 0

References

wpscan.com/vulnerability/ca99ea35-4bf8-4dc8-a817-79fb9fa1c5bd/ (technical-description, exploit, vdb-entry)

Frequently asked questions

What is CVE-2026-12271?: CVE-2026-12271 is a medium-severity vulnerability in Tutor Lms, classified under CWE-639 AUTHORIZATION BYPASS THROUGH USER-CONTROLLED KEY. CVSS score: 5.4/10. Published 2026-07-13.
How severe is CVE-2026-12271?: Medium severity. CVSS v3 base score is 5.4 out of 10.