How widely exploitable is this vulnerability?

Exploitability depends on who can modify the OpenAPI specification. If only trusted maintainers can edit it, the risk is primarily insider or supply-chain based. If external users or integrated systems can influence metadata fields without strict validation, the attack surface increases significantly.

Does an attacker need authenticated access to exploit this issue?

Not necessarily. The key requirement is control over one or more OpenAPI fields used in documentation. This control could come from authenticated access to an admin interface, a compromised build pipeline, or any upstream source feeding into the spec, regardless of whether the victim viewing the docs is authenticated.

What is the safest general fix pattern?

The most robust fix is to treat all OpenAPI metadata as untrusted and ensure that every place it is rendered passes through context-appropriate escaping or sanitization. Centralizing this logic in reusable helpers or components helps ensure consistency and reduces the chance of reintroducing unsafe patterns.

Severity:

HIGH RISK

(8.2)

Stored Cross-Site Scripting (CWE-79) in oRPC OpenAPI Documentation Generation

CVE-2026-33331

Published:

Mar 24, 2026

Status:

Undergoing Analysis

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:

Cross-Site Scripting (XSS)

CWE:

CWE-79

Impact:

Stored Cross-Site Scripting leading to arbitrary JavaScript execution in users' browsers

Severity:

HIGH RISK

(8.2)

CVSS Version:

3.1

Vulnerability Type

Category:

Cross-Site Scripting (XSS)

CWE:

CWE-79

Impact:

Stored Cross-Site Scripting leading to arbitrary JavaScript execution in users' browsers

Severity:

HIGH RISK

(8.2)

CVSS Version:

3.1

Catch This CVE While Code Is Being Written

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Ask AI for summary of CodeAnt

Stored Cross-Site Scripting (CWE-79) in oRPC OpenAPI Documentation Generation

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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