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Vulnerability record · CVE-2009-1171 · published 30 March 2009

CVE-2009-1171: Moodle improper input validation vulnerability

Moodle · Moodle

The TeX filter in Moodle 1.6 before 1.6.9+, 1.7 before 1.7.7+, 1.8 before 1.8.9, and 1.9 before 1.9.5 allows user-assisted attackers to read arbitrary files via an input command in a "$$" sequence, which causes LaTeX to include the contents of the file.

4.3 CVSS 2.0 Medium EPSS 6.2% · top 6.7% CWE-20 · Improper input validation
4.3CVSS 2.0 base score
6.2%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
28References, 2 tagged exploit
16 Jun 2026Last modified by NVD

Description

The TeX filter in Moodle 1.6 before 1.6.9+, 1.7 before 1.7.7+, 1.8 before 1.8.9, and 1.9 before 1.9.5 allows user-assisted attackers to read arbitrary files via an input command in a "$$" sequence, which causes LaTeX to include the contents of the file.

AV:N/AC:M/Au:N/C:P/I:N/A:N

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://cvs.moodle.org/moodle/filter/tex/filter.php?r1=1.18.4.4&r2=1.18.4.5 Exploit
http://lists.opensuse.org/opensuse-security-announce/2009-04/msg00010.html
http://secunia.com/advisories/34517
http://secunia.com/advisories/34557
http://secunia.com/advisories/34600
http://secunia.com/advisories/35570
http://tracker.moodle.org/browse/MDL-18552
http://www.debian.org/security/2009/dsa-1761
http://www.securityfocus.com/archive/1/502231/100/0/threaded
http://www.securityfocus.com/bid/34278
https://usn.ubuntu.com/791-2/
https://www.exploit-db.com/exploits/8297
https://www.redhat.com/archives/fedora-package-announce/2009-April/msg00077.html
https://www.redhat.com/archives/fedora-package-announce/2009-April/msg00079.html
http://cvs.moodle.org/moodle/filter/tex/filter.php?r1=1.18.4.4&r2=1.18.4.5 Exploit
http://lists.opensuse.org/opensuse-security-announce/2009-04/msg00010.html
http://secunia.com/advisories/34517
http://secunia.com/advisories/34557
http://secunia.com/advisories/34600
http://secunia.com/advisories/35570
http://tracker.moodle.org/browse/MDL-18552
http://www.debian.org/security/2009/dsa-1761
http://www.securityfocus.com/archive/1/502231/100/0/threaded
http://www.securityfocus.com/bid/34278
https://usn.ubuntu.com/791-2/
https://www.exploit-db.com/exploits/8297
https://www.redhat.com/archives/fedora-package-announce/2009-April/msg00077.html
https://www.redhat.com/archives/fedora-package-announce/2009-April/msg00079.html

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

10.0CVE-2019-3809Moodle cross-site request forgery vulnerabilityA 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, w…EPSS 0.86%10.0CVE-2006-4935Moodle improper input validation vulnerabilityThe Database module in Moodle before 1.6.2 does not properly handle uploaded files, which has unspecified impact and remote attack vectors.EPSS 1.5%10.0CVE-2006-4936Moodle improper input validation vulnerabilityMoodle before 1.6.2 does not properly validate the module instance id when creating a course module object, which has unspecified impact and remote a…EPSS 1.5%10.0CVE-2005-2247Moodle vulnerabilityMultiple unknown vulnerabilities in Moodle before 1.5.1 have unknown impact and attack vectors.EPSS 1.5%10.0CVE-2004-2233Moodle vulnerabilityUnknown "front page vulnerability with Moodle servers" for Moodle before 1.3.2 has unknown impact and attack vectors.EPSS 1.7%10.0CVE-2004-2235Moodle vulnerabilityUnknown vulnerability in Moodle before 1.2 has unknown impact and attack vectors, related to improper filtering of text.EPSS 1.4%10.0CVE-2004-2236Moodle vulnerabilityUnknown vulnerability in Moodle before 1.3.3 has unknown impact and attack vectors, related to language setting.EPSS 1.4%10.0CVE-2004-2237Moodle vulnerabilityUnknown vulnerability in Moodle before 1.3.4 has unknown impact and attack vectors, related to "strings in Moodle texts."EPSS 1.7%

Source: NIST National Vulnerability Database (record CVE-2009-1171), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.