8.6

CVSS Score

3.1

-

CVSS Score

Basic Information

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CVE-2025-26525

CVE-2025-26525: Moodle has an arbitrary file read risk through pdfTeX

Insufficient sanitizing in the TeX notation filter resulted in an arbitrary file read risk on sites where pdfTeX is available (such as those with TeX Live installed).

(GitHub Advisory)

Miggo Vulnerability Database

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CVE-2025-26525

CVE-2025-26525:

8.6

CVSS Score

3.1

-

CVSS Score

Basic Information

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Technical Details

Package Name	Ecosystem	Vulnerable Versions	First Patched Version
moodle/moodle	composer	>= 4.5.0-beta, < 4.5.2	4.5.2
moodle/moodle	composer	>= 4.4.0-beta, < 4.4.6	4.4.6
moodle/moodle	composer	>= 4.3.0-beta, < 4.3.10	4.3.10
moodle/moodle	composer	< 4.1.16	4.1.16

Technical Details

Vulnerability Intelligence
Miggo AI

Root Cause Analysis

The vulnerability stems from insufficient sanitization in the TeX notation filter. The commit reference MDL-84136 and patch context mention improvements to 'filter_tex' sanitization. Moodle's TeX filter (filter_tex::filter in filter/tex/filter.php) handles user-provided TeX content and passes it to pdfTeX. Prior to patching, it likely failed to properly sanitize commands that enable arbitrary file inclusion (e.g., \input{/etc/passwd}). This matches the CWE-552 pattern of exposing files via external command execution. The confidence is high due to the direct correlation between the vulnerability description, CWE type, and the filter_tex component explicitly mentioned in the commit reference.

Vulnerable functions

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WAF Protection Rules

WAF Rule

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Reasoning

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