CVE-2025-47928: Spotipy GitHub Actions RCE Vulnerability

CVE-2025-47928 Overview

CVE-2025-47928 is a critical security vulnerability in Spotipy, a popular Python library for the Spotify Web API. The vulnerability exists in the GitHub Actions workflow configuration (.github/workflows/integration_tests.yml) where the use of pull_request_target trigger combined with checking out the head.sha of a forked pull request creates a dangerous code execution path. This misconfiguration allows attackers to execute arbitrary untrusted code with full access to repository secrets from the base repository.

Critical Impact

Attackers can exfiltrate sensitive credentials including GITHUB_TOKEN, SPOTIPY_CLIENT_ID, and SPOTIPY_CLIENT_SECRET. The GITHUB_TOKEN has content write privileges, enabling complete repository takeover.

Affected Products

• Spotipy Python Library (commit 4f5759dbfb4506c7b6280572a4db1aabc1ac778d)
• GitHub repositories using similar pull_request_target workflow patterns

Discovery Timeline

• 2025-05-15 - CVE-2025-47928 published to NVD
• 2025-05-16 - Last updated in NVD database

Technical Details for CVE-2025-47928

Vulnerability Analysis

This vulnerability represents a significant CI/CD security misconfiguration affecting the Spotipy repository's GitHub Actions workflow. The pull_request_target event trigger is designed to run workflows from the base repository when a pull request is opened, but when combined with checking out code from the PR's head commit (head.sha), it creates a dangerous privilege escalation scenario. This allows untrusted code from a forked repository to execute with the elevated permissions and secret access of the base repository.

The weakness is classified under CWE-488 (Exposure of Data Element to Wrong Session), as the workflow exposes base repository secrets to an untrusted execution context from a forked pull request.

Root Cause

The root cause stems from a dangerous combination in the GitHub Actions workflow configuration. The pull_request_target trigger executes in the context of the base repository (including access to secrets), but the workflow was configured to checkout code from the forked PR's head commit. This architectural flaw means any malicious code submitted via a pull request from a fork would execute with full access to the repository's secrets, including authentication tokens and API credentials.

Attack Vector

An attacker can exploit this vulnerability by submitting a malicious pull request from a forked repository. The attack flow proceeds as follows:

1. Attacker forks the Spotipy repository
2. Attacker modifies the integration test code to include secret exfiltration logic
3. Attacker submits a pull request to the main repository
4. The pull_request_target workflow triggers with base repository context
5. Malicious code executes and exfiltrates GITHUB_TOKEN, SPOTIPY_CLIENT_ID, and SPOTIPY_CLIENT_SECRET
6. With the GITHUB_TOKEN having content write privileges, the attacker can push malicious commits, create releases, or completely overtake the repository

The vulnerability is exploitable remotely without authentication, requiring only the ability to create a pull request from a forked repository—a standard GitHub feature available to any user.

Detection Methods for CVE-2025-47928

Indicators of Compromise

• Unexpected pull requests from unknown forks targeting workflow files or test directories
• Unusual GitHub Actions workflow runs coinciding with external PR submissions
• Anomalous API calls using SPOTIPY_CLIENT_ID and SPOTIPY_CLIENT_SECRET credentials
• Repository modifications or commits from unexpected sources using exfiltrated GITHUB_TOKEN
• Network traffic to external endpoints during workflow execution that could indicate data exfiltration

Detection Strategies

• Review GitHub Actions audit logs for workflow runs triggered by pull_request_target events from forked repositories
• Monitor for modifications to workflow files in .github/workflows/ directory
• Implement alerting on repository permission changes or unexpected releases
• Scan workflow configurations for dangerous pull_request_target patterns combined with PR head checkout

Monitoring Recommendations

• Enable GitHub Advanced Security features to detect secret exposure in logs
• Configure branch protection rules requiring workflow approval for external contributors
• Implement automated scanning of GitHub Actions workflows for security anti-patterns
• Monitor Spotify API usage for anomalous patterns indicating credential abuse

How to Mitigate CVE-2025-47928

Immediate Actions Required

• Update Spotipy to a version containing commit 9dfb7177b8d7bb98a5a6014f8e6436812a47576f which reverts the vulnerable configuration
• Rotate all potentially compromised secrets: SPOTIPY_CLIENT_ID, SPOTIPY_CLIENT_SECRET, and regenerate repository tokens
• Audit repository history for any unauthorized changes made using exfiltrated credentials
• Review GitHub Actions workflow runs for any suspicious activity during the vulnerable period

Patch Information

The vulnerability has been addressed in commit 9dfb7177b8d7bb98a5a6014f8e6436812a47576f, which reverts the dangerous workflow configuration change introduced in commit 4f5759dbfb4506c7b6280572a4db1aabc1ac778d. For detailed patch information, see the GitHub Security Advisory and the remediation commit.

Workarounds

• Avoid using pull_request_target with code checkout from PR heads in public repositories
• Use pull_request trigger instead, which runs in the context of the forked repository without access to base secrets
• If pull_request_target is required, only checkout code from the base branch, not the PR head
• Implement workflow approval requirements for first-time contributors
• Use GitHub's environment protection rules to require manual approval before accessing secrets

# Review your workflow files for vulnerable patterns
grep -r "pull_request_target" .github/workflows/
# Check if any workflows checkout PR head after pull_request_target
grep -A 20 "pull_request_target" .github/workflows/*.yml | grep -E "ref:.*head"