How severe is CVE-2021-32476?

CVE-2021-32476 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2021-32476 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (60th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-32476?

CVE-2021-32476 affects Moodle. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-32476?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2021-32476 published?

CVE-2021-32476 was published on 2022-03-11 and last updated on 2026-06-17.

CVE-2021-32476

CVE-2021-32476 is a high-severity vulnerability in Moodle with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-770.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 1% (60th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-770
Affected product: Moodle
Published: 2022-03-11
Last modified: 2026-06-17

Description

A denial-of-service risk was identified in the draft files area, due to it not respecting user file upload limits. Moodle versions 3.10 to 3.10.3, 3.9 to 3.9.6, 3.8 to 3.8.8, 3.5 to 3.5.17 and earlier unsupported versions are affected.

Frequently asked questions

What is CVE-2021-32476?: A denial-of-service risk was identified in the draft files area, due to it not respecting user file upload limits. Moodle versions 3.10 to 3.10.3, 3.9 to 3.9.6, 3.8 to 3.8.8, 3.5 to 3.5.17 and earlier unsupported versions are affected.
How severe is CVE-2021-32476?: CVE-2021-32476 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2021-32476 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (60th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-32476?: CVE-2021-32476 affects Moodle. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-32476?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2021-32476 published?: CVE-2021-32476 was published on 2022-03-11 and last updated on 2026-06-17.

References

https://moodle.org/mod/forum/discuss.php?d=422310

Affected products (1)

cpe:2.3:a:moodle:moodle:*:*:*:*:*:*:*:*

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