What is CVE-2018-11565?

CVE-2018-11565 is a medium-severity vulnerability in Mahara, classified under Information Disclosure. CVSS score: 5.3/10. Published 2018-05-30.

How severe is CVE-2018-11565?

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

Information disclosure in Mahara

CVE-2018-11565

Mahara 17.04 before 17.04.8 and 17.10 before 17.10.5 and 18.04 before 18.04.1 are vulnerable to mentioning the usernames that are already taken by people registered in the system rather than masking that information.

Vulnerability class: Information Disclosure

Published 2018-05-30 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.

EPSS exploit prediction

EPSS: 0.009 (57.8th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 58th percentile — 57.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: 0.000

Affected products

Mahara — versions 18.04.0

Weakness classification (CWE)

CWE-200 — Information Disclosure

References

mahara.org/interaction/forum/topic.php (Vendor Advisory)
bugs.launchpad.net/mahara/+bug/1772774 (Patch, Issue Tracking, Vendor Advisory)

Frequently asked questions

What is CVE-2018-11565?: CVE-2018-11565 is a medium-severity vulnerability in Mahara, classified under Information Disclosure. CVSS score: 5.3/10. Published 2018-05-30.
How severe is CVE-2018-11565?: Medium severity. CVSS v3 base score is 5.3 out of 10.