CVE-2021-36440

9.8 criticalEPSS 4.8%

Critical (9.8) in showdoc showdoc. EPSS 4.8% chance of exploitation in the next 30 days.

Unrestricted File Upload in ShowDoc v2.9.5 allows remote attackers to execute arbitrary code via the 'file_url' parameter in the component AdminUpdateController.class.php'.

Severity

CVSS 3.1

9.8 critical

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS: 4.8% chance of exploitation in the next 30 days; higher than 91% of CVEs (scores of 2026-10-31)
CWE: CWE-434
Published: 2021-09-08
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

showdoc:showdoc

References

https://github.com/star7th/showdoc/issues/1406
https://github.com/star7th/showdoc/issues/1406

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