VulnerabilityModified
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.
MEDIUM 6.1EPSS 0.74%
Does this matter?
Lower severity and a low EPSS score (0.74%). Track it; it rarely justifies an emergency change on its own.
Description
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.
- CVSS 3.1
- 6.1 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
- EPSS
- 0.74% probability · 54th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-79
- Affected
- contao/contao
- Source
- cve@mitre.org
EPSS 0.7% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- https://contao.org/en/security-advisories/cross-site-scripting-in-the-system-log-2021.htmlVendor Advisory
- https://github.com/contao/contao/security/advisories/GHSA-h58v-c6rf-g9f7Third Party Advisory
- https://contao.org/en/security-advisories/cross-site-scripting-in-the-system-log-2021.htmlVendor Advisory
- https://github.com/contao/contao/security/advisories/GHSA-h58v-c6rf-g9f7Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.