CVE-2019-10909

Name: CVE-2019-10909
Creator: NVD / NIST
Published: 2019-05-16T22:29:00.283+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.4/10EPSS 1.05%

Last modified Jun 17, 2026

CVE-2019-10909 is a medium-severity vulnerability rated 5.4/10 on the CVSS scale. In Symfony before 2.7.51, 2.8.x before 2.8.50, 3.x before 3.4.26, 4.x before 4.1.12, and 4.2.x before 4.2.7, validation messages are not escaped, which can lead to XSS when user input is included. This is related to symfony/framework-bundle.. EPSS estimates a 1.05% chance of exploitation in the next 30 days.

Description

In Symfony before 2.7.51, 2.8.x before 2.8.50, 3.x before 3.4.26, 4.x before 4.1.12, and 4.2.x before 4.2.7, validation messages are not escaped, which can lead to XSS when user input is included. This is related to symfony/framework-bundle.

Metrics

CVSS 3.1

5.4/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

EPSS Probability

1.05%

59.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Sensiolabs	Symfony	>= 2.7.0, < 2.7.51
Sensiolabs	Symfony	>= 2.8.0, < 2.8.50
Sensiolabs	Symfony	>= 3.4.0, < 3.4.26
Sensiolabs	Symfony	>= 4.1.0, < 4.1.12
Sensiolabs	Symfony	>= 4.2.0, < 4.2.7
Drupal	Drupal	>= 8.5.0, < 8.5.15
Drupal	Drupal	>= 8.6.0, < 8.6.15

References

https://github.com/symfony/symfony/commit/ab4d05358c3d0dd1a36fc8c306829f68e3dd84e2Patch, Third Party Advisory
https://symfony.com/blog/cve-2019-10909-escape-validation-messages-in-the-php-templating-engineVendor Advisory
https://www.drupal.org/sa-core-2019-005Third Party Advisory
https://www.synology.com/security/advisory/Synology_SA_19_19Third Party Advisory
https://github.com/symfony/symfony/commit/ab4d05358c3d0dd1a36fc8c306829f68e3dd84e2Patch, Third Party Advisory
https://symfony.com/blog/cve-2019-10909-escape-validation-messages-in-the-php-templating-engineVendor Advisory
https://www.drupal.org/sa-core-2019-005Third Party Advisory
https://www.synology.com/security/advisory/Synology_SA_19_19Third Party Advisory

Timeline

Published: May 16, 2019
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2019-10909?

How severe is CVE-2019-10909?

CVE-2019-10909 has a CVSS score of 5.4/10 (MEDIUM severity). The EPSS model estimates a 1.05% probability of exploitation in the next 30 days.

How do I fix CVE-2019-10909?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2019-10909?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST