Staging Environment: Content and features may be unstable or change without notice.
Advisory details: github_osv / GHSA-8jhp-2gcr-qw96
Advisory ID github_osv/GHSA-8jhp-2gcr-qw96
Aliases CVE-2021-3943
Summary Moodle vulnerable to RCE via unsafe deserialization A flaw was found in Moodle in versions 3.11 to 3.11.3, 3.10 to 3.10.7, 3.9 to 3.9.10 and earlier unsupported versions. A remote code execution risk when restoring backup files was identified.
Status Published
Exploitability 0.5
Weighted Severity 8.8
Risk 4.4
Affected and Fixed Packages Package Details
Introduced and Fixed Package Commit Patches Package Commit Patches Details
Weaknesses (1)
CWE-20 Improper Input Validation
System Score Found at
cvssv3.1 9.8 https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2021/11/GHSA-8jhp-2gcr-qw96/GHSA-8jhp-2gcr-qw96.json
generic_textual CRITICAL
Reference id Reference type URL
https://bugzilla.redhat.com/show_bug.cgi?id=2021963
https://github.com/moodle/moodle/commit/58e8ad852f9e75c8158e5bee02c273383f7d9865
https://moodle.org/mod/forum/discuss.php?d=429095
https://nvd.nist.gov/vuln/detail/CVE-2021-3943
No exploits are available.

No EPSS data available for this advisory.

Patch URL
There are no known patches.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Found at https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2021/11/GHSA-8jhp-2gcr-qw96/GHSA-8jhp-2gcr-qw96.json
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none

There are no SSVC decisions available.