CVE-2021-35955

low-risk
Published 2021-08-12

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.

Do I need to act?

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0.31% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
4
CVSS 4.8/10 Medium
NETWORK / LOW complexity

Affected Products (1)

Affected Vendors

Contao

References (4)

Vendor Advisory https://contao.org/en/news/contao-4-9-16-and-4-11-5-are-available.html
Third Party Advisory https://github.com/contao/contao/security/advisories/GHSA-hr3h-x6gq-rqcp
Vendor Advisory https://contao.org/en/news/contao-4-9-16-and-4-11-5-are-available.html
Third Party Advisory https://github.com/contao/contao/security/advisories/GHSA-hr3h-x6gq-rqcp
25
/ 100
low-risk
Severity 19/34 · Moderate
Exploitability 1/34 · Minimal
Exposure 5/34 · Minimal