CVE-2020-21353

Severity: medium (CVSS 5.4 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.5% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2021-08-06 · updated 2026-06-17
Weakness: CWE-79

Description

A stored cross site scripting (XSS) vulnerability in /admin/snippets.php of GetSimple CMS 3.4.0a allows attackers to execute arbitrary web scripts or HTML via crafted payload in the Edit Snippets module.

Affected products

GetSimpleCMS: 3.4.0a

References

https://github.com/GetSimpleCMS/GetSimpleCMS/issues/1319
https://github.com/GetSimpleCMS/GetSimpleCMS/issues/1319

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