High

Path Traversal in Karel IP1211 IP Phone web management panel

IdentifiersCVE-2025-34023CWE-22· Improper Limitation of a Pathname…

CVE-2025-34023 is a path traversal vulnerability in the Karel IP1211 IP Phone web management interface. The issue is present in the /cgi-bin/cgiServer.exx endpoint, which does not properly sanitize or restrict user-supplied input passed via the page parameter. An authenticated remote attacker can supply crafted directory traversal sequences to cause the application to access arbitrary files on the underlying system outside the intended web root or resource scope. Exploitation evidence was observed by the Shadowserver Foundation on 2025-02-02 UTC.

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ANALYST BRIEF

Impact, mitigation & remediation

What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.

Impact

What an attacker gets, and what they’ve been doing with it.

Successful exploitation allows a remote authenticated attacker to read arbitrary files accessible to the web management process on the device. Depending on file permissions and system layout, this may expose sensitive configuration data, credentials, device settings, logs, or other internal files, potentially enabling follow-on compromise or broader access to the device environment.

Mitigation

If you can’t patch tonight, do this now.

Restrict access to the IP phone web management panel to trusted administrative networks only, and do not expose it directly to the internet. Disable the web management interface if it is not required. Enforce strong authentication for administrative access, segment voice infrastructure from untrusted networks, and monitor for suspicious requests to /cgi-bin/cgiServer.exx containing traversal patterns such as ../ or encoded equivalents. Review device logs and configurations for signs of unauthorized file access.

Remediation

Patch, then assume compromise.

Apply the vendor-provided fix or firmware update for the Karel IP1211 IP Phone addressing CVE-2025-34023 if available. The vulnerable /cgi-bin/cgiServer.exx handler should enforce strict validation and canonicalization of the page parameter, reject traversal sequences, and constrain file access to an explicit allowlist of permitted resources. If no patch information is currently available, contact the vendor for updated firmware or security guidance.

PUBLIC EXPLOITS

Exploits

No public exploits tracked yet. Mallory keeps watching.

VALID 0 / 0 TOTALView more in app

No public exploit code observed for this vulnerability.

ACTIVITY FEED

Recent activity

6 sources tracked across advisories and community write-ups. News coverage will land here when it surfaces.

6 SOURCESView more in app

No news coverage yet. Advisories and community discussion only.

What this page doesn’t show

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Exposure mapping

Query your assets running an affected version, and investigate the blast radius.

Threat actor evidence

Every observed campaign linking this CVE to a named adversary.

Associated malware

Malware families riding this exploit, with evidence and IOCs.

Detection signatures1

YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.

Vendor-by-vendor mapping

Cross-references every affected SKU, including bundled OEM variants.

Social activity6