CVE-2025-66480

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.8 under NVD CVSS v3. EPSS exploit probability: 1.4%, top 30% 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
9.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 1%CVSS: 9.8Exploit: NoneExposed: 0

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

Wildfire IM is an instant messaging and real-time audio/video solution. Prior to 1.4.3, a critical vulnerability exists in the im-server component related to the file upload functionality found in com.xiaoleilu.loServer.action.UploadFileAction. The application exposes an endpoint (/fs) that handles multipart file uploads but fails to properly sanitize the filename provided by the user. Specifically, the writeFileUploadData method directly concatenates the configured storage directory with the filename extracted from the upload request without stripping directory traversal sequences (e.g., ../../). This vulnerability allows an attacker to write arbitrary files to any location on the server's filesystem where the application process has write permissions. By uploading malicious files (such as scripts, executables, or overwriting configuration files like authorized_keys or cron jobs), an attacker can achieve Remote Code Execution (RCE) and completely compromise the server. This vulnerability is fixed in 1.4.3.

CVSS v3
9.8
EG Score
9.8(medium)
EG Risk
60(Track)
EG Risk 60/100SSVC: 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
Severity98% × 45%
Exploitation1% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS
69.6%
KEV
Not listed

Published

February 2, 2026

Last Modified

March 3, 2026

Advisory Details (3)

Auto-updated Jun 8, 2026
Patch available. Sources: github_commit, github_release, github.
github Patch Available

Arbitrary File Upload via Directory Traversal in UploadFileAction · Advisory · wildfirechat/im-server · GitHub

https://github.com/wildfirechat/im-server/security/advisories/GHSA-74hq-jhx2-fq6c
github_release Patch Available

Release version 1.4.3

Patch available: wildfirechat/im-server 1.4.3

https://github.com/wildfirechat/im-server/releases/tag/1.4.3
github_commit

commit 2f9c4e028c01 (wildfirechat/im-server)

Fix landed in wildfirechat/im-server commit 2f9c4e028c01 — awaiting tagged release

https://github.com/wildfirechat/im-server/commit/2f9c4e028c01c64913cab32e7248bcca183a5230

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 11× in last 7d / 47× 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.

  1. 2026-07-23 14:18 UTCEPSS rescore
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  3. 2026-07-23 03:01 UTCEG score recompute
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  18. 2026-07-13 20:37 UTCOSV refresh
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  1. 2026-07-06 02:23 UTCEPSS rescore
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  17. 2026-06-25 17:46 UTCOSV refresh
  18. 2026-06-25 13:49 UTCEPSS rescore
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  23. 2026-06-22 14:25 UTCEPSS rescore
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  63. 2026-05-31 00:16 UTCEPSS rescore
  64. 2026-05-29 14:52 UTCEG score recompute
  65. 2026-05-29 13:44 UTCEPSS rescore

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Frequently asked(5)

What is CVE-2025-66480?
CVE-2025-66480 is a critical vulnerability published on February 2, 2026. Wildfire IM is an instant messaging and real-time audio/video solution. Prior to 1.4.3, a critical vulnerability exists in the im-server component related to the file upload functionality found in com.xiaoleilu.loServer.action.UploadFileAction. The application exposes an endpoint (/fs) that handles…
When was CVE-2025-66480 disclosed?
CVE-2025-66480 was first published in the National Vulnerability Database on February 2, 2026, with the most recent update on March 3, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2025-66480 actively exploited?
CVE-2025-66480 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 69.6% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2025-66480?
CVE-2025-66480 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2025-66480?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-66480, 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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