How severe is CVE-2023-30626?

CVE-2023-30626 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2023-30626 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (78th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-30626?

CVE-2023-30626 affects Jellyfin. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-30626?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2023-30626 published?

CVE-2023-30626 was published on 2023-04-24 and last updated on 2026-06-17.

CVE-2023-30626

CVE-2023-30626 is a high-severity vulnerability in Jellyfin with a CVSS 3.x base score of 8.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-22.

Key facts

Severity: High (CVSS 3.x base score 8.8)
EPSS exploit prediction: 2% (78th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-22
Affected product: Jellyfin
Published: 2023-04-24
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2023-30626?: 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.
How severe is CVE-2023-30626?: CVE-2023-30626 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2023-30626 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (78th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-30626?: CVE-2023-30626 affects Jellyfin. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-30626?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2023-30626 published?: CVE-2023-30626 was published on 2023-04-24 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:jellyfin:jellyfin:*:*:*:*:*:*:*:*

More vulnerabilities in Jellyfin

CVE-2026-31852 — Critical (CVSS 10.0): Jellyfin is an open-source media system. The code-quality.yml GitHub Actions workflow in jellyfin/jellyfin-ios is…
CVE-2026-35031 — Critical (CVSS 9.9): Jellyfin is an open source self hosted media server. Versions prior to 10.11.7 contain a vulnerability chain in the…
CVE-2026-35033 — Critical (CVSS 9.1): Jellyfin is an open source self hosted media server. Versions prior to 10.11.7 contain an unauthenticated arbitrary…
CVE-2023-30627 — Critical (CVSS 9.0): jellyfin-web is the web client for Jellyfin, a free-software media system. Starting in version 10.1.0 and prior to…
CVE-2025-31499 — High (CVSS 8.8): Jellyfin is an open source self hosted media server. Versions before 10.10.7 are vulnerable to argument injection in…
CVE-2022-35909 — High (CVSS 8.8): In Jellyfin before 10.8, the /users endpoint has incorrect access control for admin functionality.

All CVEs affecting Jellyfin →

Other CWE-22 (Path Traversal) vulnerabilities

CVE-2026-48282 — Critical (CVSS 10.0): ColdFusion versions 2025.9, 2023.20 and earlier are affected by an Improper Limitation of a Pathname to a Restricted…
CVE-2026-54917 — Critical (CVSS 10.0): SeaweedFS is a distributed storage system for object storage (S3), file systems, and Iceberg tables. Prior to 4.30, the…
CVE-2026-11429 — Critical (CVSS 10.0): Two endpoints in the Vault Service ScriptsController, shared by Altium Enterprise Server and Altium 365, accept file…
CVE-2026-34909 — Critical (CVSS 10.0): A malicious actor with access to the network could exploit a Path Traversal vulnerability found in UniFi OS devices to…
CVE-2026-7411 — Critical (CVSS 10.0): In Eclipse BaSyx Java Server SDK versions prior to 2.0.0-milestone-10, inadequate path normalization in the Submodel…
CVE-2026-36767 — Critical (CVSS 10.0): A path traversal vulnerability in the /content/images/add endpoint of shopizer v3.2.5 allows attackers write arbitrary…

Browse all CWE-22 (Path Traversal) vulnerabilities →