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Vulnerability details: VCID-636u-5bdw-puh4
Vulnerability ID VCID-636u-5bdw-puh4
Aliases CVE-2019-10909
GHSA-g996-q5r8-w7g2
Summary Cross-site Scripting In Symfony, validation messages are not escaped, which can lead to XSS when user input is included.
Status Published
Exploitability 0.5
Weighted Severity 6.2
Risk 3.1
Affected and Fixed Packages Package Details
Weaknesses (3)
CWE-1035 OWASP Top Ten 2017 Category A9 - Using Components with Known Vulnerabilities
CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CWE-937 OWASP Top Ten 2013 Category A9 - Using Components with Known Vulnerabilities
System Score Found at
epss 0.00355 https://api.first.org/data/v1/epss?cve=CVE-2019-10909
epss 0.00355 https://api.first.org/data/v1/epss?cve=CVE-2019-10909
epss 0.00355 https://api.first.org/data/v1/epss?cve=CVE-2019-10909
epss 0.00355 https://api.first.org/data/v1/epss?cve=CVE-2019-10909
epss 0.00355 https://api.first.org/data/v1/epss?cve=CVE-2019-10909
epss 0.00355 https://api.first.org/data/v1/epss?cve=CVE-2019-10909
epss 0.00369 https://api.first.org/data/v1/epss?cve=CVE-2019-10909
epss 0.00369 https://api.first.org/data/v1/epss?cve=CVE-2019-10909
epss 0.00369 https://api.first.org/data/v1/epss?cve=CVE-2019-10909
epss 0.00369 https://api.first.org/data/v1/epss?cve=CVE-2019-10909
epss 0.00369 https://api.first.org/data/v1/epss?cve=CVE-2019-10909
epss 0.00369 https://api.first.org/data/v1/epss?cve=CVE-2019-10909
epss 0.00369 https://api.first.org/data/v1/epss?cve=CVE-2019-10909
epss 0.00369 https://api.first.org/data/v1/epss?cve=CVE-2019-10909
cvssv3.1_qr MODERATE https://github.com/advisories/GHSA-g996-q5r8-w7g2
cvssv3.1 5.4 https://github.com/FriendsOfPHP/security-advisories/blob/master/drupal/core/CVE-2019-10909.yaml
generic_textual MODERATE https://github.com/FriendsOfPHP/security-advisories/blob/master/drupal/core/CVE-2019-10909.yaml
cvssv3.1 5.4 https://github.com/FriendsOfPHP/security-advisories/blob/master/drupal/drupal/CVE-2019-10909.yaml
generic_textual MODERATE https://github.com/FriendsOfPHP/security-advisories/blob/master/drupal/drupal/CVE-2019-10909.yaml
cvssv3.1 5.4 https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/framework-bundle/CVE-2019-10909.yaml
generic_textual MODERATE https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/framework-bundle/CVE-2019-10909.yaml
cvssv3.1 5.4 https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/symfony/CVE-2019-10909.yaml
generic_textual MODERATE https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/symfony/CVE-2019-10909.yaml
cvssv3.1 5.4 https://github.com/symfony/symfony/commit/ab4d05358c3d0dd1a36fc8c306829f68e3dd84e2
generic_textual MODERATE https://github.com/symfony/symfony/commit/ab4d05358c3d0dd1a36fc8c306829f68e3dd84e2
cvssv3.1 5.4 https://nvd.nist.gov/vuln/detail/CVE-2019-10909
generic_textual MODERATE https://nvd.nist.gov/vuln/detail/CVE-2019-10909
cvssv3.1 5.4 https://symfony.com/blog/cve-2019-10909-escape-validation-messages-in-the-php-templating-engine
generic_textual MODERATE https://symfony.com/blog/cve-2019-10909-escape-validation-messages-in-the-php-templating-engine
cvssv3.1 5.4 https://symfony.com/cve-2019-10909
generic_textual MODERATE https://symfony.com/cve-2019-10909
cvssv3.1 5.4 https://www.drupal.org/sa-core-2019-005
generic_textual MODERATE https://www.drupal.org/sa-core-2019-005
cvssv3.1 5.4 https://www.synology.com/security/advisory/Synology_SA_19_19
generic_textual MODERATE https://www.synology.com/security/advisory/Synology_SA_19_19
Reference id Reference type URL
https://api.first.org/data/v1/epss?cve=CVE-2019-10909
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-14773
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-19789
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-19790
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-10909
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-10910
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-10911
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-10912
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-10913
https://github.com/FriendsOfPHP/security-advisories/blob/master/drupal/core/CVE-2019-10909.yaml
https://github.com/FriendsOfPHP/security-advisories/blob/master/drupal/drupal/CVE-2019-10909.yaml
https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/framework-bundle/CVE-2019-10909.yaml
https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/symfony/CVE-2019-10909.yaml
https://github.com/symfony/symfony/commit/ab4d05358c3d0dd1a36fc8c306829f68e3dd84e2
https://www.drupal.org/sa-core-2019-005
https://www.synology.com/security/advisory/Synology_SA_19_19
CVE-2019-10909 https://nvd.nist.gov/vuln/detail/CVE-2019-10909
CVE-2019-10909 https://symfony.com/cve-2019-10909
CVE-2019-10909-ESCAPE-VALIDATION-MESSAGES-IN-THE-PHP-TEMPLATING-ENGINE https://symfony.com/blog/cve-2019-10909-escape-validation-messages-in-the-php-templating-engine
GHSA-g996-q5r8-w7g2 https://github.com/advisories/GHSA-g996-q5r8-w7g2
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N Found at https://github.com/FriendsOfPHP/security-advisories/blob/master/drupal/core/CVE-2019-10909.yaml
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N Found at https://github.com/FriendsOfPHP/security-advisories/blob/master/drupal/drupal/CVE-2019-10909.yaml
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N Found at https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/framework-bundle/CVE-2019-10909.yaml
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N Found at https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/symfony/CVE-2019-10909.yaml
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N Found at https://github.com/symfony/symfony/commit/ab4d05358c3d0dd1a36fc8c306829f68e3dd84e2
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2019-10909
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N Found at https://symfony.com/blog/cve-2019-10909-escape-validation-messages-in-the-php-templating-engine
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N Found at https://symfony.com/cve-2019-10909
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N Found at https://www.drupal.org/sa-core-2019-005
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N Found at https://www.synology.com/security/advisory/Synology_SA_19_19
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Exploit Prediction Scoring System (EPSS)
Percentile 0.57834
EPSS Score 0.00355
Published At April 16, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-04-01T12:48:28.234728+00:00 GitLab Importer Import https://gitlab.com/gitlab-org/advisories-community/-/blob/main/packagist/drupal/core/CVE-2019-10909.yml 38.0.0