What’s Vulnerable › Vulnerabilities

CVE-2023-30626: Jellyfin vulnerable to directory traversal and file write causing arbitrary code execution

• Severity: high (CVSS 8.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.0% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2023-04-24 · updated 2026-06-17
• Weakness: CWE-22

Description

Jellyfin is a free-software media system. Versions starting with 10.8.0 and prior to 10.8.10 and prior have a directory traversal vulnerability inside the `ClientLogController`, specifically `/ClientLog/Document`. When combined with a cross-site scripting vulnerability (CVE-2023-30627), this can result in file write and arbitrary code execution. Version 10.8.10 has a patch for this issue. There are no known workarounds.

Affected products

• jellyfin: from 10.8.0 before 10.8.10 — fixed in 10.8.10

How to fix

Upgrade to a fixed version: jellyfin 10.8.10. Check the vendor advisory for mitigations.

References

• https://github.com/jellyfin/jellyfin-web/security/advisories/GHSA-89hp-h43h-r5pq
• https://github.com/jellyfin/jellyfin/blob/22d880662283980dec994cd7d35fe269613bfce3/Jellyfin.Api/Controllers/ClientLogController.cs#L44
• https://github.com/jellyfin/jellyfin/commit/82ad2633fdfb1c37a158057c7935f83e1129eda7
• https://github.com/jellyfin/jellyfin/pull/5918
• https://github.com/jellyfin/jellyfin/releases/tag/v10.8.10
• https://github.com/jellyfin/jellyfin/security/advisories/GHSA-9p5f-5x8v-x65m
• https://github.com/jellyfin/jellyfin-web/security/advisories/GHSA-89hp-h43h-r5pq
• https://github.com/jellyfin/jellyfin/blob/22d880662283980dec994cd7d35fe269613bfce3/Jellyfin.Api/Controllers/ClientLogController.cs#L44
• https://github.com/jellyfin/jellyfin/commit/82ad2633fdfb1c37a158057c7935f83e1129eda7
• https://github.com/jellyfin/jellyfin/pull/5918
• https://github.com/jellyfin/jellyfin/releases/tag/v10.8.10
• https://github.com/jellyfin/jellyfin/security/advisories/GHSA-9p5f-5x8v-x65m

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