CVE-2021-32768 : TYPO3 is an open source PHP based web content management system released under t

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.

Published 2021-08-10 17:15:11

Updated 2021-08-19 15:52:00

Source GitHub, Inc.

View at NVD, CVE.org

Vulnerability category: Cross site scripting (XSS)

Products affected by CVE-2021-32768

Typo3 » Typo3 » Elts Edition
Versions from including (>=) 8.0.0 and up to, including, (<=) 8.7.41
cpe:2.3:a:typo3:typo3:*:*:*:*:elts:*:*:*
Matching versions
Typo3 » Typo3
Versions from including (>=) 11.0.0 and up to, including, (<=) 11.3.1
cpe:2.3:a:typo3:typo3:*:*:*:*:*:*:*:*
Matching versions
Typo3 » Typo3
Versions from including (>=) 9.0.0 and up to, including, (<=) 9.5.28
cpe:2.3:a:typo3:typo3:*:*:*:*:*:*:*:*
Matching versions
Typo3 » Typo3 » Elts Edition
Versions from including (>=) 7.0.0 and up to, including, (<=) 7.6.52
cpe:2.3:a:typo3:typo3:*:*:*:*:elts:*:*:*
Matching versions
Typo3 » Typo3
Versions from including (>=) 10.0.0 and up to, including, (<=) 10.4.18
cpe:2.3:a:typo3:typo3:*:*:*:*:*:*:*:*
Matching versions

Exploit prediction scoring system (EPSS) score for CVE-2021-32768

EPSS FAQ

0.47%

Probability of exploitation activity in the next 30 days EPSS Score History

~ 63 %

Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2021-32768

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source
4.3	MEDIUM	AV:N/AC:M/Au:N/C:N/I:P/A:N	8.6	2.9	NIST
Access Vector: Network Access Complexity: Medium Authentication: None Confidentiality Impact: None Integrity Impact: Partial Availability Impact: None
6.1	MEDIUM	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N	2.8	2.7	NIST
Attack Vector: Network Attack Complexity: Low Privileges Required: None User Interaction: Required Scope: Changed Confidentiality: Low Integrity: Low Availability: None
6.1	MEDIUM	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N	2.8	2.7	GitHub, Inc.
Attack Vector: Network Attack Complexity: Low Privileges Required: None User Interaction: Required Scope: Changed Confidentiality: Low Integrity: Low Availability: None

CWE ids for CVE-2021-32768

CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.
Assigned by:
- nvd@nist.gov (Primary)
- security-advisories@github.com (Secondary)

References for CVE-2021-32768

https://github.com/TYPO3/TYPO3.CMS/security/advisories/GHSA-c5c9-8c6m-727v

Cross-Site Scripting via Rich-Text Content · Advisory · TYPO3/typo3 · GitHub
Third Party Advisory
https://typo3.org/security/advisory/typo3-core-sa-2021-013

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Vendor Advisory

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Vulnerability Details : CVE-2021-32768

Products affected by CVE-2021-32768

Exploit prediction scoring system (EPSS) score for CVE-2021-32768

CVSS scores for CVE-2021-32768

CWE ids for CVE-2021-32768

References for CVE-2021-32768