CVE-2026-121546
ruTorrent before 5.3.20 Path Traversal via datadir Plugin Symlink Following
ruTorrent before 5.3.20 contains a path traversal vulnerability in the datadir plugin that allows authenticated users to escape the topDirectory jail because correctDirectory() does not resolve symbolic links. Attackers can submit a datadir path through a symlink under their top directory to create directories and move torrent data to locations writable by the web server or rtorrent.
Fixes and workarounds
Fix
The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.
Source: CNA: VulnCheckAffected products and versions
| Product | Versions | Authority |
|---|---|---|
| ruTorrent Novik |
≥ 0; < 5.3.20 (affected, semver)
Other versions: unaffected |
CNA: VulnCheck |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
| Version / score | Vector | Authority |
|---|---|---|
| 4.0 / 6.0 medium |
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N | CNA: VulnCheck |
| 3.1 / 5.9 medium |
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:L | CNA: VulnCheck |
| 4.0 / 6.0 medium |
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X | NVD: [email protected] |
| 3.1 / 5.9 medium |
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:L | NVD: [email protected] |
Exploit evidence
No exploit evidence in collected sources. This is not proof of no exploitation.
References
- https://github.com/Novik/ruTorrent/issues/3474CNA: VulnCheck · issue-tracking
- https://github.com/Novik/ruTorrentCNA: VulnCheck · product
- https://github.com/Novik/ruTorrent/commit/2059ff12464b2ce14fd0f53df8d6b19fb6b8a5ebCNA: VulnCheck · patch
- https://github.com/Novik/ruTorrent/blob/v5.3.19/plugins/datadir/action.php#L60CNA: VulnCheck · technical-description
- https://github.com/Novik/ruTorrent/blob/v5.3.19/php/settings.php#L526-L541CNA: VulnCheck · technical-description
- https://www.vulncheck.com/advisories/rutorrent-before-5.3.20-path-traversal-via-datadir-plugin-symlink-followingCNA: VulnCheck · third-party-advisory
- https://github.com/Novik/ruTorrent[email protected]
- https://github.com/Novik/ruTorrent/blob/v5.3.19/php/settings.php#L526-L541[email protected]
- https://github.com/Novik/ruTorrent/blob/v5.3.19/plugins/datadir/action.php#L60[email protected]
- https://github.com/Novik/ruTorrent/commit/2059ff12464b2ce14fd0f53df8d6b19fb6b8a5eb[email protected]
- https://github.com/Novik/ruTorrent/issues/3474[email protected]
- https://www.vulncheck.com/advisories/rutorrent-before-5.3.20-path-traversal-via-datadir-plugin-symlink-following[email protected]
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