Vulnerability CVE-2021-35955
Published: 2021-08-12

Description:
Contao >=4.0.0 allows backend XSS via HTML attributes to an HTML field. Fixed in 4.4.56, 4.9.18, 4.11.7.

Type:

CWE-79

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

CVSS2 => (AV:N/AC:M/Au:S/C:N/I:P/A:N)

CVSS Base Score
Impact Subscore
Exploitability Subscore
3.5/10
2.9/10
6.8/10
Exploit range
Attack complexity
Authentication
Remote
Medium
Single time
Confidentiality impact
Integrity impact
Availability impact
None
Partial
None
Affected software
Contao -> Contao 

 References:
https://contao.org/en/news/contao-4-9-16-and-4-11-5-are-available.html
https://github.com/contao/contao/security/advisories/GHSA-hr3h-x6gq-rqcp
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