CVE-2025-63784: An Open Redirect vulnerability exists in the OAuth callback handler in file onlook/apps/web/client/src/app/aut

Routine

MEDIUM 6.5DOWNGRADE

CVE-2025-63784 is a medium-severity flaw (CVSS 6.5) affecting onlook. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An Open Redirect vulnerability exists in the OAuth callback handler in file onlook/apps/web/client/src/app/auth/callback/route.ts in Onlook web application 0.2.32. The vulnerability occurs because the application trusts the X-Forwarded-Host header value without proper validation when constructing a redirect URL. A remote attacker can send a manipulated X-Forwarded-Host header to redirect an authenticated user to an arbitrary external website unde

Why this priority

Public exploit reference

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	6.5 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.4% (top 61%)
CISA exploited list	No
Weakness	CWE-601
Published	2025-11-07
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: onlook

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2025-11-07 17:15 UTCPublished CVE record published
2026-06-17 09:53 UTCUpdated Record last modified

onlook onlook DOWNGRADE

Affected: 0.2.32

Fixed in: no fixed release known

Safe to downgrade to: a release before 0.2.32

1. Check installed version

apt-cache policy onlook || rpm -q onlook || onlook --version

2. No fixed release: DOWNGRADE to a release before 0.2.32 (Debian / Ubuntu)

apt-cache madison onlook sudo apt install onlook=<VERSION_BEFORE_0.2.32> sudo apt-mark hold onlook

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list onlook sudo dnf downgrade onlook-<VERSION_BEFORE_0.2.32> sudo dnf versionlock add onlook

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2025-63784?

onlook: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2025-63784 being exploited?

CVE-2025-63784 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2025-63784 affect?

CVE-2025-63784 affects onlook. Severity is medium (CVSS 6.5). An Open Redirect vulnerability exists in the OAuth callback handler in file onlook/apps/web/client/src/app/auth/callback/route.ts in Onlook web application 0.2.32. The vulnerability occurs because the application trusts the X-Forwarded-Host

How urgent is CVE-2025-63784?

Priority 37/100. Public exploit reference

Related CVEs

CVE-2025-63785 MEDIUM 6.1 DOWNGRADE A DOM-based Cross-Site Scripting (XSS) vulnerability exists in the text editor feature of the Onlook web appli
CVE-2025-63783 HIGH 7.6 DOWNGRADE A Broken Object Level Authorization (BOLA) vulnerability was discovered in the tRPC project mutation APIs (upd

References

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