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Vela Server Has Insufficient Webhook Payload Data Verification

High severity GitHub Reviewed Published Mar 10, 2025 in go-vela/server • Updated Mar 10, 2025

Package

gomod github.com/go-vela/server (Go)

Affected versions

< 0.25.3
>= 0.26.0, < 0.26.2

Patched versions

0.25.3
0.26.3

Description

Impact

Users with an enabled repository with access to repo level CI secrets in Vela are vulnerable to the exploit.

Any user with access to the CI instance and the linked source control manager can perform the exploit.

Method

By spoofing a webhook payload with a specific set of headers and body data, an attacker could transfer ownership of a repository and its repo level secrets to a separate repository.

These secrets could be exfiltrated by follow up builds to the repository.

Patches

v0.26.3 — Image: target/vela-server:v0.26.3
v0.25.3 — Image: target/vela-server:v0.25.3

Workarounds

Is there a way for users to fix or remediate the vulnerability without upgrading?

There are no workarounds to the issue.

References

Are there any links users can visit to find out more?

Please see linked CWEs (common weakness enumerators) for more information.

References

@ecrupper ecrupper published to go-vela/server Mar 10, 2025
Published by the National Vulnerability Database Mar 10, 2025
Published to the GitHub Advisory Database Mar 10, 2025
Reviewed Mar 10, 2025
Last updated Mar 10, 2025

Severity

High

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
High
Privileges required
Low
User interaction
None
Scope
Changed
Confidentiality
High
Integrity
High
Availability
High

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H

EPSS score

Exploit Prediction Scoring System (EPSS)

This score estimates the probability of this vulnerability being exploited within the next 30 days. Data provided by FIRST.
(18th percentile)

Weaknesses

CVE ID

CVE-2025-27616

GHSA ID

GHSA-9m63-33q3-xq5x

Source code

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