CVE-2024-21625Network attack vector

One-click remote code execution via unsanitized deep links

Published Jan 4, 2024 · Updated Sep 4, 2024

Improper input validation in SideQuest before 0.10.35 allows remote attackers to execute code through a malicious sidequest:// link. The Electron desktop application's custom-protocol handler accepts and dispatches deep-link URLs without consistently parsing and sanitizing their action data. Exploitation requires a connected Quest device and a user click inside the application, after which attacker-supplied actions execute with the application's privileges.

CVSS severity8.8
High
EPSS probability0.84%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper input validation in SideQuest before 0.10.35 allows remote attackers to execute code through a malicious sidequest:// link. The Electron desktop application's custom-protocol handler accepts and dispatches deep-link URLs without consistently parsing and sanitizing their action data. Exploitation requires a connected Quest device and a user click inside the application, after which attacker-supplied actions execute with the application's privileges.

The record

CVE
CVE-2024-21625
Published
Jan 4, 2024
Updated
Sep 4, 2024
Vendor
SideQuest
Product
SideQuest
Classifications
CWE-20, T1204.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 4, 2024CVE publishedPublication date reported by the CVE source.
  2. Sep 4, 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=< 0.10.35

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

SideQuest · SideQuestversion=< 0.10.35

Published CVSS scores

8.8GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
8.8NISTCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

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-20Improper Input Validation
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

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Your stack

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