CVE-2023-46735Network attack vector

Script execution via unescaped webhook type

Published Nov 10, 2023 · Updated Sep 3, 2024

Cross-site scripting in Symfony Webhook Component 6.3.0 through 6.3.7 allows remote attackers to execute script via a crafted webhook type. WebhookController::handle() inserts the URL-derived type value into an HTML-capable 404 response without escaping or a text/plain content type. A user must open the crafted URL in a browser, allowing the injected script to run in the affected application's origin.

CVSS severity6.1
Medium
EPSS probability0.57%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-site scripting in Symfony Webhook Component 6.3.0 through 6.3.7 allows remote attackers to execute script via a crafted webhook type. WebhookController::handle() inserts the URL-derived type value into an HTML-capable 404 response without escaping or a text/plain content type. A user must open the crafted URL in a browser, allowing the injected script to run in the affected application's origin.

The record

CVE
CVE-2023-46735
Published
Nov 10, 2023
Updated
Sep 3, 2024
Vendor
Symfony
Product
Symfony
Classifications
CWE-79, CWE-80, T1189
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 10, 2023CVE publishedPublication date reported by the CVE source.
  2. Sep 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=>= 6.3.0, < 6.3.8

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Symfony · Symfonyversion=>= 6.3.0, < 6.3.8

Published CVSS scores

6.1GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CWE-80Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)
T1189Drive-by Compromise

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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