CVE-2019-10909
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.
Does this matter?
Lower severity and a low EPSS score (1.03%). Track it; it rarely justifies an emergency change on its own.
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.
- CVSS 3.1
- 5.4 MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
- EPSS
- 1.03% probability · 63th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-79
- Affected
- sensiolabs/symfony · drupal/drupal
- Source
- cve@mitre.org
EPSS 1.0% since 27 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
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
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.