CVE-2024-50345Network attack vector

Open redirect via browser-normalized invalid URI characters

Published Nov 6, 2024 · Updated Nov 3, 2025

Open redirect in Symfony before 5.4.46, 6.0.0 through 6.4.13, and 7.0.0 through 7.1.6 allows attackers to redirect users via a crafted URI. HttpFoundation's Request::create methods accept backslashes, CR, LF, tabs, and boundary control characters that browsers normalize before URL validation. Exploitation requires application code to validate or redirect from such a URI and user interaction with the resulting link; successful use sends the user to an attacker-chosen domain.

CVSS severity3.1
Low
EPSS probability0.55%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Open redirect in Symfony before 5.4.46, 6.0.0 through 6.4.13, and 7.0.0 through 7.1.6 allows attackers to redirect users via a crafted URI. HttpFoundation's Request::create methods accept backslashes, CR, LF, tabs, and boundary control characters that browsers normalize before URL validation. Exploitation requires application code to validate or redirect from such a URI and user interaction with the resulting link; successful use sends the user to an attacker-chosen domain.

The record

CVE
CVE-2024-50345
Published
Nov 6, 2024
Updated
Nov 3, 2025
Vendor
Symfony
Product
Symfony
Classifications
CWE-601, T1566.002
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 6, 2024CVE publishedPublication date reported by the CVE source.
  2. Nov 3, 2025Record 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=< 5.4.46
  2. Affected versionversion=>= 6.0.0, < 6.4.14
  3. Affected versionversion=>= 7.0.0, < 7.1.7

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Symfony · Symfonyversion=< 5.4.46; version=>= 6.0.0, < 6.4.14; version=>= 7.0.0, < 7.1.7

Published CVSS scores

6.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
3.1GitHub, Inc.CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N
2.3GitHub Advisory DatabaseCVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA: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-601URL Redirection to Untrusted Site ('Open Redirect')
T1566.002Spearphishing Link

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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