CVE-2025-63783: onlook Input Validation Flaw — Exploit

Description

A Broken Object Level Authorization (BOLA) vulnerability was discovered in the tRPC project mutation APIs (update, delete, add/remove tag) of the Onlook web application 0.2.32. The vulnerability exists because the API fails to verify the ownership or membership of the currently authenticated user for the requested project ID. An authenticated attacker can send a malicious request containing another user's project ID to unlawfully modify, delete, or manipulate tags on that project, which can severely compromise data integrity and availability.

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CVSS v3.1 Score

7.6

HIGH

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:H

Weakness Type (CWE)

CWE-20 Improper Input Validation

Affected Products

Vendor	Product	Versions
onlook	onlook	All

References

Exploits

https://blog.soohyun.tech/CVE-2025-63783-IDOR-in-Onlook-27a557175d2e8061a3dbc931da53f095

Other References

https://tossbank.notion.site/IDOR-in-onlook-27a557175d2e8061a3dbc931da53f095

Frequently Asked Questions

What is CVE-2025-63783? +

A Broken Object Level Authorization (BOLA) vulnerability was discovered in the tRPC project mutation APIs (update, delete, add/remove tag) of the Onlook web application 0.2.32. The vulnerability exists because the API fails to verify the ownership or membership of the currently authenticated user for the requested project ID. An authenticated attacker can send a malicious request containing another user's project ID to unlawfully modify, delete, or manipulate tags on that project, which can severely compromise data integrity and availability. It has a CVSS v3.1 base score of 7.6 (HIGH).

How severe is CVE-2025-63783? +

CVE-2025-63783 has a CVSS v3.1 score of 7.6 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.

What products are affected by CVE-2025-63783? +

CVE-2025-63783 affects products from onlook, specifically: onlook. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-63783? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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