CVE-2025-46559

MEDIUMNVD 5.45.4—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 5.4 under NVD CVSS v3. EPSS exploit probability: 0.4%, top 71% 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
Elevated
5.4EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.4Exploit: Elevated riskExposed: 0

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

Misskey is an open source, federated social media platform. Starting in version 12.31.0 and prior to version 2025.4.1, missing validation in Mk:api allows malicious AiScript code to access additional endpoints that it isn't designed to have access to. The missing validation allows malicious AiScript code to prefix a URL with ../ to step out of the /api directory, thereby being able to make requests to other endpoints, such as /files, /url, and /proxy. Version 2025.4.1 fixes the issue.

CVSS v3
5.4
EG Score
5.4(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
Severity54% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
35%
KEV
Not listed

Published

May 5, 2025

Last Modified

September 3, 2025

References (2)

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 5× in last 7d / 38× 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 106 total refreshes for this CVE.

  1. 2026-08-06 13:46 UTCEPSS rescore
  2. 2026-08-05 19:16 UTCEPSS rescore
  3. 2026-08-04 15:09 UTCEPSS rescore
  4. 2026-08-04 10:37 UTCEPSS rescore
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  15. 2026-07-24 06:41 UTCOSV refresh
  16. 2026-07-23 14:18 UTCEPSS rescore
  17. 2026-07-23 02:56 UTCEG score recompute
  18. 2026-07-22 14:07 UTCEPSS rescore
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  20. 2026-07-21 15:24 UTCEPSS rescore
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  1. 2026-07-16 17:02 UTCEPSS rescore
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  15. 2026-07-07 02:21 UTCOSV refresh
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  22. 2026-07-02 17:01 UTCEPSS rescore
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  24. 2026-06-30 23:22 UTCEPSS rescore
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  26. 2026-06-28 14:07 UTCEPSS rescore
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  28. 2026-06-28 04:55 UTCEPSS rescore
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  39. 2026-06-21 14:56 UTCEPSS rescore
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  41. 2026-06-21 01:59 UTCEPSS rescore
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  43. 2026-06-19 19:25 UTCEPSS rescore
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  45. 2026-06-18 17:52 UTCEPSS rescore
  46. 2026-06-18 17:52 UTCEPSS rescore
  47. 2026-06-18 13:35 UTCOSV refresh
  48. 2026-06-17 17:52 UTCEPSS rescore
  49. 2026-06-17 17:52 UTCEPSS rescore
  50. 2026-06-16 17:52 UTCEPSS rescore
  51. 2026-06-16 17:52 UTCEPSS rescore
  52. 2026-06-15 17:48 UTCEPSS rescore
  53. 2026-06-14 23:17 UTCEPSS rescore
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  55. 2026-06-12 23:11 UTCEPSS rescore
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  63. 2026-06-07 15:24 UTCEPSS rescore
  64. 2026-06-06 13:47 UTCEPSS rescore
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  66. 2026-06-05 22:46 UTCEPSS rescore
  67. 2026-06-05 22:46 UTCEPSS rescore
  68. 2026-06-05 06:10 UTCEPSS rescore
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  70. 2026-06-04 13:12 UTCEPSS rescore
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  72. 2026-06-02 20:12 UTCEPSS rescore
  73. 2026-06-02 20:12 UTCEPSS rescore
  74. 2026-06-01 13:51 UTCEPSS rescore
  75. 2026-06-01 13:51 UTCEPSS rescore

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Frequently asked(5)

What is CVE-2025-46559?
CVE-2025-46559 is a medium vulnerability published on May 5, 2025. Misskey is an open source, federated social media platform. Starting in version 12.31.0 and prior to version 2025.4.1, missing validation in Mk:api allows malicious AiScript code to access additional endpoints that it isn't designed to have access to. The missing validation allows malicious…
When was CVE-2025-46559 disclosed?
CVE-2025-46559 was first published in the National Vulnerability Database on May 5, 2025, with the most recent update on September 3, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2025-46559 actively exploited?
CVE-2025-46559 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 65.2% of all scored CVEs.
What is the CVSS score of CVE-2025-46559?
CVE-2025-46559 has a CVSS v3 base score of 5.4 (NVD).
How do I remediate CVE-2025-46559?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-46559, 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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