Moodle Logged in users could view all calendar events

published 2019-03-26 7 y ago modified 2026-06-17 4 mo ago also GHSA-45rw-4r25-jvg7 , EUVD-2022-2309

cvss: 4.3; version 3.0, 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: 0; none known

A vulnerability was found in moodle before versions 3.6.3, 3.5.5 and 3.4.8. Permissions were not correctly checked before loading event information into the calendar's edit event modal popup, so logged in non-guest users could view unauthorised calendar events. (Note: It was read-only access, users could not edit the events.)

Patch / fix

fixed in 2 links 2

packagist moodle/moodle 3.4.8, 3.5.5, 3.6.3
moodle moodle 3.4.8, 3.5.5, 3.6.3

moodle.org/mod/forum/discuss.php?d=384011#p1547743 advisory
bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3848 advisory

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2019-3848 updated 2025-11-21 cvss 4.3

moodle: Logged in users could view all calendar events

Red Hat All currently supported Red Hat products
not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

0.92% chance of exploitation in the next 30 days, higher than 60% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.0	4.3	CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
NVD	3.1	4.3	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
NVD	2.0	4.0	AV:N/AC:L/Au:S/C:P/I:N/A:N
GitHub	3.1	4.3	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Affected packages

ecosystem	package	affected	fixed in
packagist	moodle/moodle	>=3.4, <3.4.8 >=3.5, <3.5.5 >=3.6, <3.6.3	3.4.8 3.5.5 3.6.3

Affected products

[UNKNOWN] moodle

Classification

Weakness

CWE-863 Incorrect Authorization

References

moodle.org /mod/forum/discuss.php?d=384011#p1547743
web, patch, vendor-advisory
bugzilla.redhat.com /show_bug.cgi?id=CVE-2019-3848
web, issue-tracking, patch, third-party-advisory
nvd.nist.gov /vuln/detail/CVE-2019-3848
advisory
github.com /moodle/moodle
package

Sources

CVE List CVE-2019-3848
GitHub Advisory GHSA-45rw-4r25-jvg7
NVD CVE-2019-3848

Fencer Vulns 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.

Summary