Is this vulnerability remotely exploitable over the internet?

Yes, if an attacker can obtain valid credentials and reach the Grav CMS admin or File Manager upload interfaces, they can attempt to exploit XXE remotely via crafted SVG uploads.

Does an attacker need administrative access to exploit this?

Not necessarily. Exploitation requires any account role that can upload SVG files through the vulnerable interfaces. The exact required role depends on how permissions are configured in the specific Grav deployment.

What is the safest general fix pattern?

The safest pattern is to disable XML external entities and DTD processing at the parser level, and to treat SVG uploads as untrusted content that must be sanitized or transformed before use. Where possible, convert uploaded SVGs to inert image formats before serving them.

Severity:

HIGH RISK

(7.6)

XML External Entity (XXE) (CWE-611) in Grav CMS SVG Upload Handling

CVE-2026-29924

Published:

Mar 30, 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:

XML External Entity (XXE)

CWE:

CWE-611

Impact:

Sensitive Data Exposure and Server-Side Request Forgery (SSRF)

Severity:

HIGH RISK

(7.6)

CVSS Version:

3.1

Vulnerability Type

Category:

XML External Entity (XXE)

CWE:

CWE-611

Impact:

Sensitive Data Exposure and Server-Side Request Forgery (SSRF)

Severity:

HIGH RISK

(7.6)

CVSS Version:

3.1

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XML External Entity (XXE) (CWE-611) in Grav CMS SVG Upload Handling

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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