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CVE-2023-28330

Moodle: authenticated arbitrary file read through malformed backup file

MEDIUM
6.5
CVSS Score
Published: March 23, 2023 at 12:00 AM UTC
Updated: June 17, 2026 at 05:47 AM UTC
1 product affected across 1 vendorMoodle

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Severity
MEDIUM6.5
Exploit prediction
EPSS 1%
SSVC
No known exploit

Description

Insufficient sanitizing in backup resulted in an arbitrary file read risk. The capability to access this feature is only available to teachers, managers and admins by default.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Moodle· Moodle
95%
v < 3.9.203.11.0 ≤ v < 3.11.134.0.0 ≤ v < 4.0.74.1.0 ≤ v < 4.1.23.11.0 < v < 3.11.133.9.0 < v < 3.9.204.0.0 < v < 4.0.73.11.03.9.04.0.04.1.04.1.1
Affected range stops below 3.11.13, so it looks safe — our inference, not a vendor statement
Affected range stops below 3.9.20, so it looks safe — our inference, not a vendor statement
Affected range stops below 4.0.7, so it looks safe — our inference, not a vendor statement
Affected range stops below 4.1.2, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (3)

Issue Trackingx_refsource_REDHAT
Source: [email protected]
https://bugzilla.redhat.com/show_bug.cgi?id=2179412
Vendor Advisory
Source: [email protected]
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3QZN34VSF4HTCW3C3ZP2OZYSLYUKADPF/
PatchVendor Advisory
Source: [email protected]
https://moodle.org/mod/forum/discuss.php?d=445062

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

6.5MEDIUMCISA-ADP
Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-20NVD-CWE-noinfo

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