CVE-2021-47900

9.3 criticalEPSS 0.7%

Critical (9.3). EPSS 0.7% chance of exploitation in the next 30 days.

Gila CMS versions prior to 2.0.0 contain a remote code execution vulnerability that allows unauthenticated attackers to execute arbitrary system commands through manipulated HTTP headers. Attackers can inject PHP code in the User-Agent header with shell_exec() to run system commands by sending crafted requests to the admin endpoint.

Severity

CVSS 4.0

9.3 critical

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

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: 0.7% chance of exploitation in the next 30 days; higher than 53% of CVEs (scores of 2026-10-31)
CWE: CWE-98
Published: 2026-01-27
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

References

https://gilacms.com/
https://github.com/GilaCMS/gila
https://www.exploit-db.com/exploits/49412
https://www.vulncheck.com/advisories/gila-cms-remote-code-execution

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