CVE-2024-32880 Overview
CVE-2024-32880 is an authenticated remote code execution vulnerability in pyLoad, an open-source download manager written in Python. An authenticated user can modify the download folder path and upload a crafted template file to that location. When the template is rendered by the application, attacker-controlled code executes on the host. The issue is classified under CWE-434: Unrestricted Upload of File with Dangerous Type. No patched release was available at the time of publication.
Critical Impact
An authenticated attacker can achieve remote code execution on the pyLoad host by abusing configurable download paths and template rendering, resulting in full compromise of confidentiality, integrity, and availability.
Affected Products
- pyLoad Download Manager (all versions at time of publication)
- Deployments exposing the pyLoad web interface to untrusted authenticated users
- Self-hosted instances relying on default administrative access controls
Discovery Timeline
- 2024-04-26 - CVE-2024-32880 published to the National Vulnerability Database
- 2024-04-26 - GitHub Security Advisory GHSA-3f7w-p8vr-4v5f published by the pyLoad project
- 2026-06-17 - Last updated in NVD database
Technical Details for CVE-2024-32880
Vulnerability Analysis
The vulnerability chains two legitimate application features into a code execution primitive. First, an authenticated user can change the configured download folder to an arbitrary filesystem path. Second, the same user can upload a file, treated as a template, into that path. When pyLoad renders the template, the crafted payload executes within the Python process running pyLoad.
Because pyLoad templates are processed by a rendering engine that evaluates expressions, attacker-supplied template syntax leads directly to arbitrary Python execution. The bug fits the [CWE-434] pattern of unrestricted upload combined with server-side template injection semantics.
Exploitation requires prior authentication with sufficient privileges to modify configuration, which limits the attack surface but does not eliminate risk in shared or multi-tenant deployments. The EPSS score is 1.354% (69th percentile).
Root Cause
The root cause is missing validation on two paths at once. The application accepts a user-controlled download directory without constraining it to safe locations, and it renders template files from that directory without restricting content or file type. Together these behaviors permit an authenticated user to place executable template content where the server will evaluate it.
Attack Vector
The attack is delivered over the network against the pyLoad web interface. The attacker authenticates, updates the download folder to a path the template renderer reads from, uploads a file containing malicious template syntax, and triggers rendering. The resulting code runs under the pyLoad service account, providing a foothold suitable for persistence, credential theft, or lateral movement.
No verified public exploit code has been indexed for this CVE. Refer to the pyLoad GitHub Security Advisory for vendor details.
Detection Methods for CVE-2024-32880
Indicators of Compromise
- Unexpected changes to the pyLoad download folder configuration recorded in application configuration files or audit logs.
- New or modified files with template extensions inside directories that are also configured as download targets.
- Child processes spawned by the pyLoad Python interpreter that invoke shells, network utilities, or credential access tools.
- Outbound network connections originating from the pyLoad service to unfamiliar hosts shortly after template file writes.
Detection Strategies
- Monitor pyLoad configuration changes, particularly modifications to the download directory setting, and correlate with subsequent file uploads.
- Alert on write events to template directories from processes other than an administrator-driven deployment workflow.
- Baseline the pyLoad process tree and flag deviations such as python spawning sh, bash, cmd.exe, or powershell.exe.
Monitoring Recommendations
- Enable verbose authentication and configuration-change logging on pyLoad and forward events to a central analytics platform.
- Track file integrity on directories that pyLoad reads templates from, alerting on any new or renamed files.
- Correlate authenticated session activity with filesystem and process telemetry to identify the change-folder plus upload plus render sequence.
How to Mitigate CVE-2024-32880
Immediate Actions Required
- Restrict network access to the pyLoad web interface using firewall rules, VPN, or reverse-proxy authentication until a fix is available.
- Rotate all pyLoad administrative credentials and remove unused accounts to reduce the pool of users who can reach the vulnerable configuration surface.
- Run the pyLoad service under a dedicated, unprivileged user account isolated from other applications and secrets.
- Audit the current download folder configuration and reset it to a directory that is not used for template rendering.
Patch Information
At the time of publication the pyLoad maintainers had not released a fix for CVE-2024-32880. Monitor the pyLoad GitHub Security Advisory GHSA-3f7w-p8vr-4v5f and the pyLoad project releases for an updated version, and upgrade as soon as a patched build is available.
Workarounds
- Limit pyLoad accounts with configuration privileges to trusted administrators only, and disable self-service registration.
- Deploy pyLoad inside a container or sandbox with a read-only filesystem outside of designated download paths to prevent template writes.
- Place pyLoad behind an authenticating reverse proxy that enforces multi-factor authentication and IP allow-listing.
- Set filesystem ACLs so that the download folder cannot overlap with directories used for template loading.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
