Studio-42 elFinder up to 2.1.69 SSRF Protection php/elFinder.class.php fsock_get_contents server-side request forgery

Summaryinfo

A vulnerability, which was classified as problematic, was found in Studio-42 elFinder up to 2.1.69. This affects the function fsock_get_contents of the file php/elFinder.class.php of the component SSRF Protection. The manipulation results in server-side request forgery. This vulnerability is identified as CVE-2026-81889. The attack can be executed remotely. There is not any exploit available.

Detailsinfo

A vulnerability classified as problematic has been found in Studio-42 elFinder up to 2.1.69. Affected is the function fsock_get_contents of the file php/elFinder.class.php of the component SSRF Protection. The manipulation with an unknown input leads to a server-side request forgery vulnerability. CWE is classifying the issue as CWE-918. The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination. This is going to have an impact on confidentiality. CVE summarizes:

elFinder is an open-source file manager for web, written in JavaScript using jQuery UI. Prior to 2.1.70, elFinder URL uploads in php/elFinder.class.php can bypass server-side request forgery protections when PHP cURL is unavailable because validate_address() validates $info['ip'], but get_remote_contents() selects fsock_get_contents(), which connects to $arr['host'] and performs a second DNS resolution. An attacker able to submit a URL upload can use DNS rebinding to have the first resolution return a public address and the connection resolution return a loopback or private address, causing the internal HTTP response body to be stored as an uploaded file and made readable through elFinder. After a successful fetch, get_headers($url, true) separately requests the original hostname without reusing the validated and pinned connection, creating an additional blind server-side request forgery path even when curl_get_contents() is selected. This issue is fixed in version 2.1.70.

The advisory is shared for download at github.com. This vulnerability is traded as CVE-2026-81889 since 08/27/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. There are known technical details, but no exploit is available.

By approaching the search of inurl:php/elFinder.class.php it is possible to find vulnerable targets with Google Hacking.

Upgrading to version 2.1.70 eliminates this vulnerability.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Vendor

• Studio-42

Name

• elFinder

Version

• 2.1.0
• 2.1.1
• 2.1.2
• 2.1.3
• 2.1.4
• 2.1.5
• 2.1.6
• 2.1.7
• 2.1.8
• 2.1.9
• 2.1.10
• 2.1.11
• 2.1.12
• 2.1.13
• 2.1.14
• 2.1.15
• 2.1.16
• 2.1.17
• 2.1.18
• 2.1.19
• 2.1.20
• 2.1.21
• 2.1.22
• 2.1.23
• 2.1.24
• 2.1.25
• 2.1.26
• 2.1.27
• 2.1.28
• 2.1.29
• 2.1.30
• 2.1.31
• 2.1.32
• 2.1.33
• 2.1.34
• 2.1.35
• 2.1.36
• 2.1.37
• 2.1.38
• 2.1.39
• 2.1.40
• 2.1.41
• 2.1.42
• 2.1.43
• 2.1.44
• 2.1.45
• 2.1.46
• 2.1.47
• 2.1.48
• 2.1.49
• 2.1.50
• 2.1.51
• 2.1.52
• 2.1.53
• 2.1.54
• 2.1.55
• 2.1.56
• 2.1.57
• 2.1.58
• 2.1.59
• 2.1.60
• 2.1.61
• 2.1.62
• 2.1.63
• 2.1.64
• 2.1.65
• 2.1.66
• 2.1.67
• 2.1.68
• 2.1.69

Website

• Product: https://github.com/Studio-42/elFinder/

CPE 2.3info

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CPE 2.2info

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