CVE-2021-28977

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CVSS 3.1

4.8 medium

EPSS

<1%p42

Published

Jun 23, 2021 (Jun 23, 2021)

Modified

Jun 17, 2026

Description

Cross Site Scripting vulnerability in GetSimpleCMS 3.3.16 in admin/upload.php by adding comments or jpg and other file header information to the content of xla, pages, and gzip files,

Vendors: get-simple
Products: getsimplecms
Weakness: CWE-79
Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N

NVD CVE.org GitHub PoCs EPSS (0.5%)

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