CVE-2021-32768 Cross-Site Scripting via Rich-Text Content

2021-08-1016:30:11

CWE-79

GitHub_M

www.cve.org

6.1 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

CHANGED

Confidentiality Impact

LOW

Integrity Impact

LOW

Availability Impact

NONE

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

0.001 Low

EPSS

Percentile

36.3%

JSON

TYPO3 is an open source PHP based web content management system released under the GNU GPL. In affected versions failing to properly parse, sanitize and encode malicious rich-text content, the content rendering process in the website frontend is vulnerable to cross-site scripting. Corresponding rendering instructions via TypoScript functionality HTMLparser does not consider all potentially malicious HTML tag & attribute combinations per default. In default scenarios, a valid backend user account is needed to exploit this vulnerability. In case custom plugins used in the website frontend accept and reflect rich-text content submitted by users, no authentication is required. Update to TYPO3 versions 7.6.53 ELTS, 8.7.42 ELTS, 9.5.29, 10.4.19, 11.3.2 that fix the problem described.

CNA Affected

[
  {
    "product": "TYPO3.CMS",
    "vendor": "TYPO3",
    "versions": [
      {
        "status": "affected",
        "version": ">= 7.0.0, < 7.6.53"
      },
      {
        "status": "affected",
        "version": ">= 8.0.0, < 8.7.42"
      },
      {
        "status": "affected",
        "version": ">= 9.0.0, < 9.5.29"
      },
      {
        "status": "affected",
        "version": ">= 10.0.0, < 10.4.19"
      },
      {
        "status": "affected",
        "version": ">= 11.0.0, < 11.3.2"
      }
    ]
  }
]