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    CVE-2021-47900

    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.

    Published:Jan 27, 2026
    Last Modified:Apr 15, 2026
    EPS:Jan 27, 2026
    EPSS Score:0.00278
    CVSS Score:9.8

    Affected Products

    Vendor
    Gilacms
    Product
    Gila Cms

    Exploits

    No exploit reference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-193 PHP Remote File Inclusion

    Related CVEs

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    CVE-2020-26624 (CVSS 3.8) — A SQL injection vulnerability was discovered in Gila CMS 1.15.4 and earlier which allows a remote attacker to …
    CVE-2020-26625 (CVSS 3.8) — A SQL injection vulnerability was discovered in Gila CMS 1.15.4 and earlier which allows a remote attacker to …
    CVE-2020-26623 (CVSS 3.8) — SQL Injection vulnerability discovered in Gila CMS 1.15.4 and earlier allows a remote attacker to execute arbi…
    CVE-2020-20523 (CVSS 6.1) — Cross Site Scripting (XSS) vulnerability in adm_user parameter in Gila CMS version 1.11.3, allows remote attac…
    CVE-2020-20726 (CVSS 8.8) — Cross Site Request Forgery vulnerability in Gila GilaCMS v.1.11.4 allows a remote attacker to execute arbitrar…
    CVE-2021-39486 (CVSS 5.4) — A Stored XSS via Malicious File Upload exists in Gila CMS version 2.2.0. An attacker can use this to steal coo…
    CVE-2021-37777 (CVSS 7.5) — Gila CMS 2.2.0 is vulnerable to Insecure Direct Object Reference (IDOR). Thumbnails uploaded by one site owner…
    CVE-2020-20693 (CVSS 8.8) — A Cross-Site Request Forgery (CSRF) in GilaCMS v1.11.4 allows authenticated attackers to arbitrarily add admin…
    CVE-2020-20696 (CVSS 5.4) — A cross-site scripting (XSS) vulnerability in /admin/content/post of GilaCMS v1.11.4 allows attackers to execu…

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High