CVE-2021-3943

highpriority · track · 40EPSS 0.024 · 84 %ileEURUUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

2.40% (84th) EPSS

CVSS 7.5 · high

Is it mine?

14 products

Check your exposure

Who says so?

5 sources

cnnvd · enisa_euvd · fstec_bdu · osv

EPSS · scored 2026-10-27

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.

cvss

Technical severity, 0–10. One row per scoring source.

9.8

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · high–critical · 7.5–9.8

v2.07.5highAV:N/AC:L/Au:N/C:P/I:P/A:Pprimary · NVD / NIST USexploitability 10 · impact 6.4

v3.19.8criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Hprimary · NVD / NIST USexploitability 3.9 · impact 5.9

v3.19.8criticalAV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Hsecondary · FSTEC (BDU) RU

v3.19.8criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Hsecondary · OSV

v3.19criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-20USprimaryCWE-20USCWE-94US

affected products (14)

Products and version ranges known to be affected.

n/a Moodle≤ moodle 3.11.4, moodle 3.10.8 and moodle 3.9.11enisa_euvdEU
Мартин Догиамас Moodle3.10.0 → 3.10.8fstec_bduRU
Мартин Догиамас Moodle3.11.0 → 3.11.4fstec_bduRU
Мартин Догиамас Moodle3.9.0 → 3.9.11fstec_bduRU
ООО «Ред Софт» РЕД ОС≤ 7.2 Муромfstec_bduRU
moodle moodle3.10.0 → 3.10.7nvdUScpe:2.3:a:moodle:moodle:*:*:*:*:*:*:*:*
moodle moodle3.11.0 → 3.11.3nvdUScpe:2.3:a:moodle:moodle:*:*:*:*:*:*:*:*
moodle moodle3.9.0 → 3.9.10nvdUScpe:2.3:a:moodle:moodle:*:*:*:*:*:*:*:*
Bitnami moodle3.10.0 → 3.10.8osvUSpkg:bitnami/moodle
Bitnami moodle3.11.0 → 3.11.4osvUSpkg:bitnami/moodle
Bitnami moodle3.9.0 → 3.9.11osvUSpkg:bitnami/moodle
Packagist moodle/moodle3.10 → 3.10.8osvUSpkg:composer/moodle/moodle
Packagist moodle/moodle3.11 → 3.11.4osvUSpkg:composer/moodle/moodle
Packagist moodle/moodle3.9 → 3.9.11osvUSpkg:composer/moodle/moodle

advisories (2)

Vendor and ecosystem advisories describing this.

GHSA-8jhp-2gcr-qw96Moodle vulnerable to RCE via unsafe deserialization2021-11-23ghsa · osvUS
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.
BIT-moodle-2021-39432024-03-06vendor · osvUS
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.

also known as (6)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu osv nvd NVD CVE.org MITRE

published 2021-11-22modified 2026-06-17

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references (10)

External citations — patches, advisories, analysis.

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