CVE-2024-26151 Potentially untrusted input is rendered as HTML in final output

2024-02-2218:37:00

CWE-20

GitHub_M

github.com

cve-2024-26151; mjml pypi package; felixschwarz/mjml-python; html rendering; security issue; email contents

CVSS3

8.2

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

REQUIRED

Scope

CHANGED

Confidentiality Impact

LOW

Integrity Impact

HIGH

Availability Impact

LOW

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:H/A:L

SSVC

Exploitation

poc

Automatable

Technical Impact

partial

JSON

The mjml PyPI package, found at the FelixSchwarz/mjml-python GitHub repo, is an unofficial Python port of MJML, a markup language created by Mailjet. All users of FelixSchwarz/mjml-python who insert untrusted data into mjml templates unless that data is checked in a very strict manner. User input like <script> would be rendered as <script> in the final HTML output. The attacker must be able to control some data which is later injected in an mjml template which is then send out as email to other users. The attacker could control contents of email messages sent through the platform. The problem has been fixed in version 0.11.0 of this library. Versions before 0.10.0 are not affected by this security issue. As a workaround, ensure that potentially untrusted user input does not contain any sequences which could be rendered as HTML.

ADP Affected

[
  {
    "cpes": [
      "cpe:2.3:a:felixschwarz:mjml-python:*:*:*:*:*:*:*:*"
    ],
    "vendor": "felixschwarz",
    "product": "mjml-python",
    "versions": [
      {
        "status": "affected",
        "version": "0",
        "lessThan": "0.11.0",
        "versionType": "custom"
      }
    ],
    "defaultStatus": "unknown"
  }
]