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CVE-2025-66480VulnerabilityPublished

CVE-2025-66480: wildfirechat im-server · Path Traversal

Affects wildfirechat im-serverSource CVE Database V5

0

Not known to be exploited · CVSS 9.8 Critical : upgrade to 1.4.3 as a priority.

Data as of 25 Oct 2026, 19:02 UTC

CVSS 3.1 base score
9.8Critical
How severe the flaw is on the 0–10 CVSS scale.
EPSS
1.5% chance of exploitation in 30 days – higher than 74% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 1.4.3
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 2 Feb 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 2026-10-25.

What to do

Upgrade im-server and wildfirechat/im-server to 1.4.3.

Affected software

ProductAffectedFixed in
wildfirechatim-serverAffected
  • <1.4.3
Fixed in
  • 1.4.3
GitHubwildfirechat/im-serverpkg:github/wildfirechat/im-serverOther threatsAffected
  • <1.4.3
Fixed in
  • 1.4.3

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

European organizations should immediately upgrade wildfirechat im-server to version 1.4.3 or later, where the vulnerability is fixed. Until upgrading, implement strict network-level access controls to restrict access to the /fs upload endpoint only to trusted users or internal networks. Employ web application firewalls (WAFs) with custom rules to detect and block directory traversal patterns in file upload requests. Conduct thorough audits of server file permissions to minimize writable directories by the application process, reducing the potential impact of arbitrary file writes. Monitor server logs for suspicious upload activity or unexpected file modifications. Implement intrusion detection systems (IDS) to alert on anomalous behavior indicative of exploitation attempts. Additionally, review and harden SSH authorized_keys and cron job configurations to detect unauthorized changes. Establish an incident response plan to quickly isolate and remediate compromised systems. Finally, educate development teams on secure file handling practices to prevent similar vulnerabilities.

Description

CVE-2025-66480 is a critical path traversal vulnerability in the wildfirechat im-server versions prior to 1.4.3. It arises from improper sanitization of filenames in the file upload endpoint (/fs), allowing attackers to write arbitrary files anywhere on the server filesystem where the application has write permissions. Exploitation can lead to remote code execution by uploading malicious scripts or overwriting critical configuration files. The vulnerability has a CVSS score of 9.8, indicating a high impact on confidentiality, integrity, and availability without requiring authentication or user interaction. The issue is fixed in version 1.4.3.

References

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