Creation of files outside the Download Folder through malicious PAR2 files
Priority LOW 26CWE-23Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- None · Low · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA.
Summary
SABnzbd is an open source binary newsreader. A vulnerability was discovered in SABnzbd that could trick the `filesystem.renamer()` function into writing downloaded files outside the configured Download Folder via malicious PAR2 files. A patch was released as part of SABnzbd 3.2.1RC1. As a workaround, limit downloads to NZBs without PAR2 files, deny write permissions to the SABnzbd process outside areas it must access to perform its job, or update to a fixed version.
Why it matters now
EPSS 0.00893 59th percentileScored 2026-11-07
Fix Fixed sabnzbd (sabnzbd): 3.0.0, 3.2.1
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| sabnzbd | sabnzbd | before 3.0.0 | 3.0.0 | Patch available | CNA |
| sabnzbd | sabnzbd | before 3.2.1 | 3.2.1 | Patch available | CNA |
- sabnzbd Vendorsabnzbd Affected before 3.0.0 Fixed in 3.0.0 Patch available CNA
- sabnzbd Vendorsabnzbd Affected before 3.2.1 Fixed in 3.2.1 Patch available CNA
CPE configurations NVD · 5
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:sabnzbd:sabnzbd:*:*:*:*:*:*:*:* | before 3.0.0 | Vulnerable | sabnzbd |
| cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Microsoft |
| cpe:2.3:a:sabnzbd:sabnzbd:*:*:*:*:*:*:*:* | before 3.2.1 | Vulnerable | sabnzbd |
| cpe:2.3:o:apple:macos:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Apple |
| cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Linux |
- cpe:2.3:a:sabnzbd:sabnzbd:*:*:*:*:*:*:*:* Versions before 3.0.0 Vulnerable ·sabnzbd
- cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Microsoft
- cpe:2.3:a:sabnzbd:sabnzbd:*:*:*:*:*:*:*:* Versions before 3.2.1 Vulnerable ·sabnzbd
- cpe:2.3:o:apple:macos:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Apple
- cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Linux
Remediation
- Fix · CNA sabnzbd (sabnzbd) Fixed in 3.0.0
- Fix · CNA sabnzbd (sabnzbd) Fixed in 3.2.1
Timeline
- 2026-10-02 Threatist record created from CVE-2021-29488
More Sabnzbd vulnerabilities
- TI-2023-17073 Remote code execution via specially crafted script settings in SABnzbd CVSS 3.1CRITICAL 9.8
- TI-2020-10315 SABnzbd 2.3.9 and 3.0.0Alpha2 has a command injection vulnerability in the web… CVSS 3.1HIGH 8.8
Sources
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences