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CWE-917: Improper Neutralization of Special Elements used in an Expression Language Statement ('Expression Language Injection')
Weakness Summary
The product constructs all or part of an expression language (EL) statement in a framework such as a Java Server Page (JSP) using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended EL statement before it is executed.
- Canonical source: MITRE CWE-917 (opens in a new tab)
- Published Atomicorp CVE observations: 8
- Distinct affected products in those observations: 6
- Active Atomicorp rules associated with this weakness: 14
Atomicorp Research Context
Atomicorp has published CVE-specific research observations associated with this weakness category. Each linked CVE page states whether the tested request was detected or blocked and is the authoritative customer-facing finding.
The CVEs and rules shown here are selected published examples, not a complete list of Atomicorp protections. If a CWE, CVE, or rule is absent from this page, no conclusion should be drawn about whether Atomicorp protects against that weakness or attack method.
A CWE describes a class of software weakness. It does not identify one exploit request, and association with a CWE does not mean that every vulnerability or exploitation path in that category is detected or blocked.
Selected Published CVE Observations
| CVE | Vulnerability | Product | Atomicorp finding | Observed rules |
|---|---|---|---|---|
| CVE-2021-44228 | Apache Log4j2 Remote Code Injection | log4j | Attack Blocked by Atomicorp | 345115 , 345117 , 345118 , 393655 |
| CVE-2022-22947 | Spring Cloud Gateway Code Injection | spring cloud gateway | Attack Blocked by Atomicorp | 344370 , 393655 |
| CVE-2020-17530 | Apache Struts 2.0.0-2.5.25 - Remote Code Execution | struts | Attack Blocked by Atomicorp | 344360 , 347009 |
| CVE-2021-31805 | Apache Struts2 S2-062 - Remote Code Execution | struts | Attack Blocked by Atomicorp | 330791 , 340152 |
| CVE-2022-26134 | Confluence - Remote Code Execution | confluence data center | Attack Blocked by Atomicorp | 337209 , 337211 , 340087 |
| CVE-2021-45046 | Apache Log4j2 - Remote Code Injection | log4j | Attack Blocked by Atomicorp | 345115 , 345117 , 345118 , 393655 |
| CVE-2019-16469 | Adobe Experience Manager - Expression Language Injection | experience manager | Attack Blocked by Atomicorp | 393655 |
| CVE-2019-9041 | ZZZCMS 1.6.1 - Remote Code Execution | zzzphp | Attack Blocked by Atomicorp | 360153 , 380026 |
Associated Atomicorp WAF Rules
| Rule | Status | Behavior |
|---|---|---|
| 330791 | Active | disruptive (deny) |
| 337209 | Active | disruptive (deny) |
| 337211 | Active | disruptive (deny) |
| 340087 | Active | disruptive (deny) |
| 340152 | Active | disruptive (deny) |
| 344360 | Active | disruptive (deny) |
| 344370 | Active | disruptive (deny) |
| 345115 | Active | disruptive (deny) |
| 345117 | Active | disruptive (deny) |
| 345118 | Active | disruptive (deny) |
| 347009 | Active | disruptive (deny) |
| 360153 | Active | disruptive (deny) |
| 380026 | Active | disruptive (deny) |
| 393655 | Active | disruptive (deny) |