CVE-2025-27516

MEDIUM EPSS 36.9%
Published Mar 5, 20251y ago · Modified Jun 17, 20261w ago
5.4 CVSS 4.0
Medium
Find Similar
Published Mar 5, 2025 1y ago
Last Modified Jun 17, 2026 1w ago

Description

Jinja is an extensible templating engine. Prior to 3.1.6, an oversight in how the Jinja sandboxed environment interacts with the |attr filter allows an attacker that controls the content of a template to execute arbitrary Python code. To exploit the vulnerability, an attacker needs to control the content of a template. Whether that is the case depends on the type of application using Jinja. This vulnerability impacts users of applications which execute untrusted templates. Jinja's sandbox does catch calls to str.format and ensures they don't escape the sandbox. However, it's possible to use the |attr filter to get a reference to a string's plain format method, bypassing the sandbox. After the fix, the |attr filter no longer bypasses the environment's attribute lookup. This vulnerability is fixed in 3.1.6.

CVSS Details

Base Score
5.4
Exploitability
—
Impact
—
Vector string
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:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction P
Scope X

Threat Intelligence

EPSS Exploit Probability
36.9% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-1336

Affected Products 2

VendorProductVersionRange
palletsprojectsjinja* <3.1.6
debiandebian_linux11.0any

References 4

  • github.com https://github.com/pallets/jinja/commit/90457bbf33b8662926ae65cdde4c4c32e756e403
    Patch
  • github.com https://github.com/pallets/jinja/security/advisories/GHSA-cpwx-vrp4-4pq7
    Vendor Advisory
  • lists.debian.org https://lists.debian.org/debian-lts-announce/2025/04/msg00022.html
  • lists.debian.org https://lists.debian.org/debian-lts-announce/2025/04/msg00045.html
    Mailing ListThird Party Advisory

Remediation

  • github.com https://github.com/pallets/jinja/commit/90457bbf33b8662926ae65cdde4c4c32e756e403
    Patch