CVE-2022-0333Network attack vector

Calendar event exposure and modification via overbroad capability

Published Jan 25, 2022 · Updated Aug 2, 2024

Incorrect authorization in affected Moodle LMS releases allows remote authenticated users to read or modify any calendar event. Calendar event authorization interprets calendar:manageentries as permission for unrestricted CRUD operations without excluding user-level events. Manager access with that capability is required, and successful exploitation exposes or changes events belonging to other users.

CVSS severity3.8
Low
EPSS probability0.57%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Incorrect authorization in affected Moodle LMS releases allows remote authenticated users to read or modify any calendar event. Calendar event authorization interprets calendar:manageentries as permission for unrestricted CRUD operations without excluding user-level events. Manager access with that capability is required, and successful exploitation exposes or changes events belonging to other users.

The record

CVE
CVE-2022-0333
Published
Jan 25, 2022
Updated
Aug 2, 2024
Vendor
Moodle
Product
Moodle LMS
Classifications
CWE-863
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jan 25, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 2, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=moodle 3.11.5, moodle 3.10.9 and moodle 3.9.12

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Moodle · Moodle LMSversion=moodle 3.11.5, moodle 3.10.9 and moodle 3.9.12

Published CVSS scores

3.8Canonical UbuntuCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-863Incorrect Authorization

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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