CVE-2021-29488

Creation of files outside the Download Folder through malicious PAR2 files

MEDIUM
5.3
CVSS Score
Published: May 7, 2021 at 03:00 PM UTC
Updated: June 17, 2026 at 03:47 AM UTC
1 product affected across 1 vendorSabnzbd· also runs on 3 platforms

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Severity
MEDIUM5.3
Exploit prediction
EPSS 0.9%

Description

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 3.0.0v < 3.2.1
Affected range stops below 3.0.0, so it looks safe — our inference, not a vendor statement
Affected range stops below 3.2.1, so it looks safe — our inference, not a vendor statement
apple-macos (environment) · linux-linux-kernel (environment) · microsoft-windows (environment)

Runs on — not affected

The affected product only carries this flaw when running on these platforms. The platforms themselves are not vulnerable.

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

References (1)

CVSS

Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
LOW
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-23

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