CVE-2023-30626

HIGHNVD 8.88.8—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.8 under NVD CVSS v3. EPSS exploit probability: 2.0%, top 22% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
8.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 2%CVSS: 8.8Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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.

CVSS v3
8.8
EG Score
8.8(medium)
EG Risk
40(Track)
EG Risk 40/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity88% × 45%
Exploitation2% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
2%
EPSS %ILE
79%
KEV
Not listed

Published

April 24, 2023

Last Modified

November 21, 2024

Advisory Details (6)

Auto-updated Aug 24, 2026
Patch available. Sources: github, github_commit, github_pr, github_release.
github_pr

Add endpoint to log client events

Fix merged in jellyfin/jellyfin PR #5918 on 2021-11-08 — awaiting tagged release

https://github.com/jellyfin/jellyfin/pull/5918
github_commit

commit 82ad2633fdfb (jellyfin/jellyfin)

Fix landed in jellyfin/jellyfin commit 82ad2633fdfb — awaiting tagged release

https://github.com/jellyfin/jellyfin/commit/82ad2633fdfb1c37a158057c7935f83e1129eda7
generic

jellyfin/Jellyfin.Api/Controllers/ClientLogController.cs at 22d880662283980dec994cd7d35fe269613bfce3 · jellyfin/jellyfin · GitHub

https://github.com/jellyfin/jellyfin/blob/22d880662283980dec994cd7d35fe269613bfce3/Jellyfin.Api/Controllers/ClientLogController.cs#L44
github Patch Available

Stored XSS vulnerability in devices.js · Advisory · jellyfin/jellyfin-web · GitHub

https://github.com/jellyfin/jellyfin-web/security/advisories/GHSA-89hp-h43h-r5pq
github Patch Available

Directory traversal + file write causing arbitrary code execution · Advisory · jellyfin/jellyfin · GitHub

https://github.com/jellyfin/jellyfin/security/advisories/GHSA-9p5f-5x8v-x65m
github_release Patch Available

10.8.10

Patch available: jellyfin/jellyfin v10.8.10

https://github.com/jellyfin/jellyfin/releases/tag/v10.8.10

Affected Packages

(1 across 1 ecosystem)
NuGet(1)
PackageVulnerable rangeFixed inDependents
Jellyfin.Controller10.8.0, 10.8.1, 10.8.2, 10.8.3, 10.8.410.8.10—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 7× in last 7d / 28× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 154 total refreshes for this CVE.

  1. 2026-09-07 15:59 UTCEPSS rescore
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  29. 2026-07-23 02:21 UTCEG score recompute
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  75. 2026-06-23 21:31 UTCEPSS rescore

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2023-30626?
CVE-2023-30626 is a high vulnerability published on April 24, 2023. 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…
When was CVE-2023-30626 disclosed?
CVE-2023-30626 was first published in the National Vulnerability Database on April 24, 2023, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2023-30626 actively exploited?
CVE-2023-30626 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 2% probability of exploitation in the next 30 days, which ranks it in the top 20.9% of all scored CVEs.
What is the CVSS score of CVE-2023-30626?
CVE-2023-30626 has a CVSS v3 base score of 8.8 (NVD).
How do I remediate CVE-2023-30626?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2023-30626, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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