CVE-2020-25630

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2020-12-08 · updated 2026-06-17
Weakness: CWE-400

Description

A vulnerability was found in Moodle where the decompressed size of zip files was not checked against available user quota before unzipping them, which could lead to a denial of service risk. This affects versions 3.9 to 3.9.1, 3.8 to 3.8.4, 3.7 to 3.7.7, 3.5 to 3.5.13 and earlier unsupported versions. Fixed in 3.9.2, 3.8.5, 3.7.8 and 3.5.14.

Affected products

Moodle: from 3.5.0 before 3.5.14; from 3.7.0 before 3.7.8; from 3.8.0 before 3.8.5; from 3.9.0 before 3.9.2 — fixed in 3.5.14, 3.7.8, 3.8.5, 3.9.2

How to fix

Upgrade to a fixed version: Moodle 3.5.14, 3.7.8, 3.8.5, 3.9.2. Check the vendor advisory for mitigations.

References

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