Is this vulnerability remotely exploitable?

Yes, if the /snail-job/workflow/check-node-expression endpoint is reachable over the network and accepts attacker-controlled input, an external attacker may exploit it. If access is restricted to internal users, the risk is more limited to insider or lateral-movement scenarios.

What level of access does an attacker need?

The attacker must be able to send crafted requests to the vulnerable interface and control the QLExpress expression parameter. Whether this requires authentication depends on how the application is configured and exposed.

What is the safest general fix pattern?

The safest pattern is to avoid evaluating user-supplied expressions altogether. If dynamic expressions are required, enforce a constrained expression grammar with strict allowlists, disable access to sensitive classes and APIs, and ensure the evaluator cannot directly reach the file system or runtime environment.

Severity:

CRITICAL RISK

(9.4)

Expression Injection (CWE-94) in RuoYi-Vue-Plus Snailjob Workflow Checker

CVE-2025-66916

Published:

Jan 8, 2026

Status:

Analyzed

Summary

Affected Context

Exploit Preconditions

Why This Happens

Potential Impact

General Mitigation Guidance

How Teams Detect Issues Like This

Frequently Asked Questions

Source

NDV

Recent Vulnerabilities

CWE-77;CWE-78

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in Totolink A7100RU setGameSpeedCfg CGI Handler

Remote Code Execution on the Router

April 6, 2026

CWE-77;CWE-78

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in Totolink A7100RU setFirewallType Handler

Remote Code Execution on Router Firmware

April 6, 2026

Vulnerability Type

Category:

Expression Language Injection

CWE:

CWE-94

Impact:

Arbitrary File Read/Write and Potential Remote Code Execution

Severity:

CRITICAL RISK

(9.4)

CVSS Version:

3.1

Vulnerability Type

Category:

Expression Language Injection

CWE:

CWE-94

Impact:

Arbitrary File Read/Write and Potential Remote Code Execution

Severity:

CRITICAL RISK

(9.4)

CVSS Version:

3.1

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Ask AI for summary of CodeAnt

Expression Injection (CWE-94) in RuoYi-Vue-Plus Snailjob Workflow Checker

Summary

Affected Context

Exploit Preconditions

Why This Happens

Potential Impact

General Mitigation Guidance

How Teams Detect Issues Like This

Frequently Asked Questions

Source

Recent Vulnerabilities

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in Totolink A7100RU setGameSpeedCfg CGI Handler

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in Totolink A7100RU setFirewallType Handler

Vulnerability Type

Vulnerability Type

Vulnerability Type

Catch This CVE While Code Is Being Written

Ship clean & secure code faster

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