#VU56689 Improper Neutralization of Special Elements in Output Used by a Downstream Component in GLPI - CVE-2021-39213

Vulnerability identifier: #VU56689

Vulnerability risk: Medium

CVSSv4.0: 4.9 [CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2021-39213

CWE-ID: CWE-74

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
GLPI
Web applications / CRM systems

Vendor: glpi-project

Description

The vulnerability allows a remote attacker to compromise the target system.

The vulnerability exists due to improper inout validation. A remote authenticated attacker can bypass API with custom header injection.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

GLPI: 9.1 - 9.5.5

---

External links
https://github.com/glpi-project/glpi/security/advisories/GHSA-6w9f-2m6g-5777
https://github.com/glpi-project/glpi/releases/tag/9.5.6

---

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.