GHSA-wph3-44rj-92pr — critical GitHub Advisory (CVE-2021-32682) in composer/studio-42/elfinder

Description

Impact

We recently fixed several vulnerabilities affect elFinder 2.1.58. These vulnerabilities can allow an attacker to execute arbitrary code and commands on the server hosting the elFinder PHP connector, even with the minimal configuration.

Patches

The issues were addressed in our last release, 2.1.59.

Workarounds

If you can't update to 2.1.59, make sure your connector is not exposed without authentication.

Reference

Further technical details will be disclosed on https://blog.sonarsource.com/tag/security after some time.

For more information

If you have any questions or comments about this advisory, you can contact:
- The original reporters, by sending an email to [email protected];
- The maintainers, by opening an issue on this repository.

Basic information

Type: reviewed
Severity: critical
Advisory on GitHub: Open advisory ↗
Repository advisory: Open repository advisory ↗
Source code: Browse source ↗
Published (advisory): 2021-06-16 17:04:29 UTC
Updated: 2023-01-29 05:02:39 UTC
GitHub reviewed: 2021-06-15 21:01:45 UTC
NVD published: 2021-06-14

Score	Percentile
92.77%	99.75%

CVSS Scores

Base score	Version	Severity	Vector
9.8	3.1	—	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H` Click to expand Attack vector (AV:N) Could be attacked over the internet or any normal routed network—not just someone sitting at the machine. Attack complexity (AC:L) Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup. Privileges required (PR:N) No account or special rights needed—anonymous or random user is enough. User interaction (UI:N) Nobody has to click “OK” or open a trap file; it can work without a victim helping. Scope (S:U) Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems. Confidentiality (C:H) Serious risk that confidential data gets exposed in a big way. Integrity (I:H) They could widely tamper with or forge data—trust in the data is badly hurt. Availability (A:H) Could take the service down hard or make it unusable for people who depend on it.

Identifiers

Type	Value
GHSA	GHSA-wph3-44rj-92pr ↗
CVE	CVE-2021-32682 ↗

CWEs

CWE id	Name
CWE-22	Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
CWE-78	Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
CWE-918	Server-Side Request Forgery (SSRF)

Credits

thomas-chauchefoin-sonarsource (analyst)

Affected packages (1)

Vulnerable version ranges and first patched releases as published by GitHub.

Ecosystem	Package	Vulnerable range	First patched	Vulnerable functions
composer	studio-42/elfinder	< 2.1.59	2.1.59	—

elFinder before 2.1.59 contains multiple vulnerabilities leading to RCE