6.1

CVE-2026-45753

Symfony: HtmlSanitizer UrlAttributeSanitizer Omits action/formaction/poster/cite — javascript: URI Survives Sanitization (XSS)

Symfony is a PHP framework for web and console applications and a set of reusable PHP components. From 6.1.0-BETA1 until 6.4.40, 7.4.12, and 8.0.12, UrlAttributeSanitizer::getSupportedAttributes() omits URL-valued attributes including action, formaction, poster, and cite, so configurations that admit those attributes can leave javascript: URIs unsanitized and enable XSS when the resulting HTML is rendered or a victim submits a form or clicks a button. This issue is fixed in versions 6.4.40, 7.4.12, and 8.0.12.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Sensiolabs ≫ Symfony Version >= 6.1.0 < 6.4.40
Sensiolabs ≫ Symfony Version >= 7.0.0 < 7.4.12
Sensiolabs ≫ Symfony Version >= 8.0.0 < 8.0.12
Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.29% 0.215
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
NIST 6.1 2.8 2.7
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
security-advisories@github.com 2.1 0 0
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CWE-184 Incomplete List of Disallowed Inputs

The product implements a protection mechanism that relies on a list of inputs (or properties of inputs) that are not allowed by policy or otherwise require other action to neutralize before additional processing takes place, but the list is incomplete.

CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.

https://github.com/symfony/symfony/releases/tag/v6.4.40
Product
Release Notes
https://github.com/symfony/symfony/releases/tag/v7.4.12
Product
Release Notes
https://github.com/symfony/symfony/releases/tag/v8.0.12
Product
Release Notes
https://github.com/symfony/symfony/commit/487728e7e180a674a6d4c01bd0cb56161cc441b7
Patch
https://github.com/symfony/symfony/security/advisories/GHSA-hhg7-c65m-h7ff
Patch
Vendor Advisory