What’s Vulnerable › Vulnerabilities

CVE-2020-18657

• Severity: medium (CVSS 6.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.4% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-06-23 · updated 2026-06-17
• Weakness: CWE-79

Description

Cross Site Scripting (XSS) vulnerability in GetSimpleCMS <= 3.3.15 in admin/changedata.php via the redirect_url parameter and the headers_sent function.

Affected products

• GetSimpleCMS: through 3.3.15

References

• https://github.com/GetSimpleCMS/GetSimpleCMS/issues/1310
• https://github.com/LoRexxar/CVE_Request/blob/master/getsimplecms%20v3.3.15/getsimplecms_before_v3.3.15.md
• https://www.seebug.org/vuldb/ssvid-97929
• https://github.com/GetSimpleCMS/GetSimpleCMS/issues/1310
• https://github.com/LoRexxar/CVE_Request/blob/master/getsimplecms%20v3.3.15/getsimplecms_before_v3.3.15.md
• https://www.seebug.org/vuldb/ssvid-97929

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