CVE-2024-45247Network attack vector

User redirection via unrestricted post-login return URL

Published Oct 6, 2024 · Updated Oct 7, 2024

Open redirect in Sonarr before 4.0.9.2244 allows remote attackers to redirect users to untrusted sites through a crafted login URL. The post-login handler passed the supplied returnUrl to a redirect without requiring a local-path destination. Exploitation requires a user to follow the crafted URL and complete the login flow; the result is navigation to attacker-controlled content, not direct server compromise.

CVSS severity6.1
Medium
EPSS probability0.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Open redirect in Sonarr before 4.0.9.2244 allows remote attackers to redirect users to untrusted sites through a crafted login URL. The post-login handler passed the supplied returnUrl to a redirect without requiring a local-path destination. Exploitation requires a user to follow the crafted URL and complete the login flow; the result is navigation to attacker-controlled content, not direct server compromise.

The record

CVE
CVE-2024-45247
Published
Oct 6, 2024
Updated
Oct 7, 2024
Vendor
Sonarr
Product
Sonarr
Classifications
CWE-601, T1204.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 6, 2024CVE publishedPublication date reported by the CVE source.
  2. Oct 7, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=before version 4.0.9.2244 <Upgrade to version 4.0.9.2244 or higher

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Sonarr · Sonarrversion=before version 4.0.9.2244 <Upgrade to version 4.0.9.2244 or higher

Published CVSS scores

6.1Israel National Cyber DirectorateCVSS: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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 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')
T1204.001Malicious 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

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo