Unrestricted file uploads in Contao

published 2019-12-17 6 y ago modified 2026-06-17 4 mo ago also GHSA-wjx8-cgrm-hh8p , EUVD-2019-0804

cvss: 8.8; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 1.1%; EPSS 1.1% chance of exploitation in 30 days, percentile 66%
public exploits: 0; none known

Contao 4.0 through 4.8.5 allows PHP local file inclusion. A back end user with access to the form generator can upload arbitrary files and execute them on the server.

Patch / fix

fixed in 2

packagist contao/core-bundle 4.4.46, 4.8.6
packagist contao/contao 4.4.46, 4.8.6

Exploit prediction

1.11% chance of exploitation in the next 30 days, higher than 66% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
NVD	3.1	8.8	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD	2.0	6.5	AV:N/AC:L/Au:S/C:P/I:P/A:P
GitHub	3.1	8.8	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected packages

ecosystem	package	affected	fixed in
packagist	contao/core-bundle	>=4.0.0, <4.4.46 >=4.5.0, <4.8.6	4.4.46 4.8.6
packagist	contao/contao	>=4.0.0, <4.4.46 >=4.5.0, <4.8.6	4.4.46 4.8.6

Classification

Weakness

CWE-434 Unrestricted Upload of File with Dangerous Type

References

contao.org /en/news.html
web, vendor-advisory
contao.org /en/security-advisories/unrestricted-file-uploads.html
web, vendor-advisory
github.com /contao/contao/security/advisories/GHSA-wjx8-cgrm-hh8p
web
nvd.nist.gov /vuln/detail/CVE-2019-19745
advisory
github.com /FriendsOfPHP/security-advisories/blob/master/contao/contao/CVE-2019-19745.yaml
web
github.com /FriendsOfPHP/security-advisories/blob/master/contao/core-bundle/CVE-2019-19745.yaml
web
github.com /contao/contao
package

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary