XSS in Contao
CVE-2021-35210
Contao 4.5.x through 4.9.x before 4.9.16, and 4.10.x through 4.11.x before 4.11.5, allows XSS. It is possible to inject code into the tl_log table that will be executed in the browser when the system log is called in the back end.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.007 (52.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 53rd percentile — 52.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000
Affected products
Weakness classification (CWE)
References
- contao.org/en/security-advisories/cross-site-scripting-in-the-system-log-2021.h… (Vendor Advisory)
- github.com/contao/contao/security/advisories/GHSA-h58v-c6rf-g9f7 (Third Party Advisory)
Frequently asked questions
- What is CVE-2021-35210?
- CVE-2021-35210 is a medium-severity vulnerability in Contao, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2021-06-23.
- How severe is CVE-2021-35210?
- Medium severity. CVSS v3 base score is 6.1 out of 10.