CVE-2025-66480: wildfirechat im-server · Path Traversal
Affects wildfirechat im-serverSource CVE Database V5
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
- 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:HExploitation evidence
Disclosed: evidence found.
CVE published 2 Feb 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by 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
| Product | Affected | Fixed in |
|---|---|---|
| wildfirechatim-server | Affected
| Fixed in
|
GitHubwildfirechat/im-serverpkg:github/wildfirechat/im-serverOther threats | Affected
| Fixed in
|
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.