CVE-2021-20280
CVSS v3
5.4
MEDIUM
EPSS Score
1.3 %
exploit probability, as of 2026-10-19
CISA KEV
No
known exploited
Exploitation
—
SSVC status
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Affected and fixed versions
Packages from OSV.dev and products from the vendors' CSAF advisories.
version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.
Packages
- moodleBitnamifrom 3.5.0 · fixed in 3.5.17
- moodle/moodlePackagistfrom 3.5 · fixed in 3.5.17
Vendor advisories
- CVE-2021-20280 Red Hat Product Security
moodle: Stored XSS and blind SSRF possible via feedback answer text
Description
Text-based feedback answers required additional sanitizing to prevent stored XSS and blind SSRF risks in moodle before 3.10.2, 3.9.5, 3.8.8, 3.5.17.
Technical details
- Published
- 2021-03-15
Frequently asked questions
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Related vulnerabilities
Same product first, then the same vendor advisory and the same publication week.