10

CVSS Score

3.0

-

CVSS Score

Basic Information

CVE ID

CVE-2019-3809

GHSA ID

GHSA-jp4g-r8c9-3534

EPSS Score

0.50975%

CWE

CWE-918

Published

5/13/2022

Updated

4/23/2024

KEV Status

Technology

PHP

Basic Information

CVE ID

GHSA ID

EPSS Score

CWE

Published

Updated

KEV Status

Technology

Concerned about an active attack path?

Talk to our security experts and see Miggo in action.

Miggo Vulnerability Database

→

CVE-2019-3809

CVE-2019-3809: Moodle Blind SSRF Risk in /badges/mybackpack.php

A flaw was found in Moodle versions 3.1 to 3.1.15 and earlier unsupported versions. The mybackpack functionality allowed setting the URL of badges, when it should be restricted to the Mozilla Open Badges backpack URL. This resulted in the possibility of blind SSRF via requests made by the page.

(GitHub Advisory)

Miggo Vulnerability Database

→

CVE-2019-3809

CVE-2019-3809:

10

CVSS Score

3.0

-

CVSS Score

Basic Information

CVE ID

CVE-2019-3809

GHSA ID

GHSA-jp4g-r8c9-3534

EPSS Score

0.50975%

CWE

CWE-918

Published

5/13/2022

Updated

4/23/2024

KEV Status

Technology

PHP

Basic Information

CVE ID

GHSA ID

EPSS Score

CWE

Published

Updated

KEV Status

Technology

Technical Details

CVSS Vector

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Package Name	Ecosystem	Vulnerable Versions	First Patched Version
moodle/moodle	composer	>= 3.1, < 3.1.16	3.1.16

Technical Details

Vulnerability Intelligence
Miggo AI

Root Cause Analysis

The vulnerability stems from improper URL validation in the Mozilla Open Badges backpack integration. Key indicators:

The advisory explicitly references /badges/mybackpack.php as the vulnerable endpoint
SSRF occurs through badge URL parameter handling
The patch (MDL-64222) would logically add validation checks before making external requests
Moodle's badge system architecture suggests these functions handle backpack configuration
'set_config' storage without validation creates persistent SSRF opportunities While exact function names aren't visible in public commits, the file path and vulnerability pattern strongly implicate the URL processing and storage mechanisms in mybackpack.php.

Vulnerable functions

Only Mi**o us*rs **n s** t*is s**tion

WAF Protection Rules

WAF Rule

W** rul*s *v*il**l* *or Mi**o *ustom*rs only.W** rul*s *v*il**l* *or Mi**o *ustom*rs only.W** rul*s *v*il**l* *or Mi**o *ustom*rs only.W** rul*s *v*il**l* *or Mi**o *ustom*rs only.W** rul*s *v*il**l* *or Mi**o *ustom*rs only.W** rul*s *v*il**l* *or Mi**o *ustom*rs only.W** rul*s *v*il**l* *or Mi**o *ustom*rs only.W** rul*s *v*il**l* *or Mi**o *ustom*rs only.W** rul*s *v*il**l* *or Mi**o *ustom*rs only.W** rul*s *v*il**l* *or Mi**o *ustom*rs only.

Reasoning

*v*il**l* *or Mi**o *ustom*rs only.*v*il**l* *or Mi**o *ustom*rs only.*v*il**l* *or Mi**o *ustom*rs only.*v*il**l* *or Mi**o *ustom*rs only.*v*il**l* *or Mi**o *ustom*rs only.*v*il**l* *or Mi**o *ustom*rs only.*v*il**l* *or Mi**o *ustom*rs only.*v*il**l* *or Mi**o *ustom*rs only.*v*il**l* *or Mi**o *ustom*rs only.*v*il**l* *or Mi**o *ustom*rs only.

10

-

Basic Information

Basic Information

Concerned about an active attack path?

CVE-2019-3809: Moodle Blind SSRF Risk in /badges/mybackpack.php

CVE-2019-3809:

10

-

Basic Information

Basic Information

Technical Details

Technical Details

Vulnerability IntelligenceMiggo AI

Root Cause Analysis

Vulnerable functions

WAF Protection Rules

WAF Rule

Reasoning

Vulnerability IntelligenceMiggo AI

Technical Details

CVE-2019-3809: Moodle Blind SSRF Risk in /badges/mybackpack.php

10

10

Vulnerability IntelligenceMiggo AI

Root Cause Analysis

Vulnerable functions

WAF Protection Rules

WAF Rule

Reasoning

Basic Information

Basic Information

Vulnerability Intelligence
Miggo AI

Vulnerability Intelligence
Miggo AI

Vulnerability Intelligence
Miggo AI