#VU105387 Input validation error in Jinja - CVE-2025-27516

Vulnerability identifier: #VU105387

Vulnerability risk: Low

CVSSv4.0: 2 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2025-27516

CWE-ID: CWE-20

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Jinja
Web applications / Modules and components for CMS

Vendor: The Pallets Projects

Description

The vulnerability allows a local user to compromise the target system.

The vulnerability exists due to sandbox breakout through attr filter selecting format method. A local user can execute arbitrary code on the system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Jinja: 3.1.0 - 3.1.5

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External links
https://github.com/pallets/jinja/commit/90457bbf33b8662926ae65cdde4c4c32e756e403
https://github.com/pallets/jinja/security/advisories/GHSA-cpwx-vrp4-4pq7

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Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

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