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CVE-2021-21809: Moodle command execution vulnerability exists in the default legacy spellchecker plugin

critical Affects moodle/moodle. Feed 2026.10.29.3, updated 2026-10-29; published ; advisory modified .

Moodle command execution vulnerability exists in the default legacy spellchecker plugin

Package
moodle/moodle Composer
Affected versions
=3.10.0 or =3.11.2 or =3.8.0
Fixed in
no fix recorded
Severity
critical  CVSS 9.1
Exploitation
not on CISA KEV · EPSS 24% (97.8th percentile)
Published
2022-05-24
Source
osv.dev

References

CWE-732
NVD recordmoodle/moodle advisories

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# then
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