What’s Vulnerable › Vulnerabilities

CVE-2024-40624: Deserialization of untrusted data in torrentpier/torrentpier

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.0% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-07-15 · updated 2026-06-17
• Weakness: CWE-502

Description

TorrentPier is an open source BitTorrent Public/Private tracker engine, written in php. In `torrentpier/library/includes/functions.php`, `get_tracks()` uses the unsafe native PHP serialization format to deserialize user-controlled cookies. One can use phpggc and the chain Guzzle/FW1 to write PHP code to an arbitrary file, and execute commands on the system. For instance, the cookie bb_t will be deserialized when browsing to viewforum.php. This issue has been addressed in commit `ed37e6e52` which is expected to be included in release version 2.4.4. Users are advised to upgrade as soon as the new release is available. There are no known workarounds for this vulnerability.

Affected products

• torrentpier: before 2.4.4 — fixed in 2.4.4

How to fix

Upgrade to a fixed version: torrentpier 2.4.4. Check the vendor advisory for mitigations.

References

• https://github.com/torrentpier/torrentpier/blob/84f6c9f4a081d9ffff4c233098758280304bf50f/library/includes/functions.php#L41-L60
• https://github.com/torrentpier/torrentpier/commit/ed37e6e522f345f2b46147c6f53c1ab6dec1db9e
• https://github.com/torrentpier/torrentpier/security/advisories/GHSA-fg86-4c2r-7wxw
• https://github.com/torrentpier/torrentpier/blob/84f6c9f4a081d9ffff4c233098758280304bf50f/library/includes/functions.php#L41-L60
• https://github.com/torrentpier/torrentpier/commit/ed37e6e522f345f2b46147c6f53c1ab6dec1db9e
• https://github.com/torrentpier/torrentpier/security/advisories/GHSA-fg86-4c2r-7wxw

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