usmannasir CyberPanel up to 2.4.3 Remote Backup Feature authorized_keys remote server address improper authorization

Summaryinfo

A vulnerability marked as very critical has been reported in usmannasir CyberPanel up to 2.4.3. The impacted element is an unknown function of the file /root/.ssh/authorized_keys of the component Remote Backup Feature. Performing a manipulation of the argument remote server address results in improper authorization. This vulnerability is reported as CVE-2026-71965. The attack is possible to be carried out remotely. No exploit exists.

Detailsinfo

A vulnerability, which was classified as very critical, was found in usmannasir CyberPanel up to 2.4.3. This affects an unknown code of the file /root/.ssh/authorized_keys of the component Remote Backup Feature. The manipulation of the argument remote server address with an unknown input leads to a improper authorization vulnerability. CWE is classifying the issue as CWE-285. The product does not perform or incorrectly performs an authorization check when an actor attempts to access a resource or perform an action. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

CyberPanel 2.4.3, fixed in commit eca0c3c, contains an authenticated remote code execution vulnerability in the remote backup feature that allows authenticated attackers to gain root-level SSH access by supplying a malicious remote server address. Attackers can exploit the unverified SSH public key retrieval process to write an attacker-controlled public key directly to /root/.ssh/authorized_keys, granting persistent root access to the host system.

It is possible to read the advisory at themcsam.github.io. This vulnerability is uniquely identified as CVE-2026-71965 since 08/08/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 08/10/2026). The attack technique deployed by this issue is T1548.002 according to MITRE ATT&CK.

Applying the patch eca0c3cbeb35af8eaae9fafb094e8ef3cd923643 is able to eliminate this problem.

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Vendor

• usmannasir

Name

• CyberPanel

Version

• 2.4.0
• 2.4.1
• 2.4.2
• 2.4.3

CPE 2.3info

• 🔒
• 🔒
• 🔒

CPE 2.2info

• 🔒
• 🔒
• 🔒

CVSSv4info

CVSSv3info

CVSSv2info

Exploitinginfo

Threat Intelligenceinfo

Countermeasuresinfo

Timelineinfo

Sourcesinfo

Entryinfo

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Discussion