CVE-2024-49379Public exploitNetwork attack vector

Server command execution via unchecked login redirect

Published Nov 13, 2024 · Updated Nov 21, 2024

Reflected XSS in Umbrel umbrelOS before 1.2.2 allows remote attackers to execute JavaScript through a crafted login redirect URL. The use-auth.tsx loginWithJwt path assigns the unchecked redirect query value to window.location.href after storing the user's JWT. A user who can reach the instance must open the link and complete login; the script can reuse the session token with the terminal WebSocket to run server commands or read files.

CVSS severity5.3
Medium
EPSS probability1.29%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Reflected XSS in Umbrel umbrelOS before 1.2.2 allows remote attackers to execute JavaScript through a crafted login redirect URL. The use-auth.tsx loginWithJwt path assigns the unchecked redirect query value to window.location.href after storing the user's JWT. A user who can reach the instance must open the link and complete login; the script can reuse the session token with the terminal WebSocket to run server commands or read files.

The record

CVE
CVE-2024-49379
Published
Nov 13, 2024
Updated
Nov 21, 2024
Vendor
Umbrel
Product
umbrelOS
Classifications
CWE-79, T1204.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 13, 2024CVE publishedPublication date reported by the CVE source.
  2. Nov 21, 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=0 <1.2.2
  2. Affected versionversion=< 1.2.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Umbrel · umbrelOSversion=0 <1.2.2; version=< 1.2.2

Published CVSS scores

5.3GitHub, Inc.CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/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 exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1204.001Malicious Link

Public exploit references

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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