Machine-written summary
Summary written by Claude Haiku from the source advisory. Not reviewed by a person.
Contao core-bundle and contao/contao versions 4.8.4 up to but not including 4.8.6 are affected. An attacker can inject insert tags through the Contao login module, and these tags are replaced with their output when the page is rendered. Upgrade to Contao 4.8.6. The source lists no workarounds.
Not analysed yet
We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.
Severity and exploitation
| Score | Rating | CVSS | Vector | Source |
|---|---|---|---|---|
| 5.3 | Medium | 3.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N | GitHub Advisory Database |
- CISA KEV Not listed.
- EPSS 0.0082, the 57th percentile, on 10 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.
Timeline
- 31 Oct 2026, 14:30 UTC First seen by agentprime
- 31 Oct 2026, 14:30 UTC Confirmed by OSV
Sources
- GitHub Advisory Database: GHSA-jc43-qrrp-98f5
- OSV: GHSA-jc43-qrrp-98f5
- github.com/contao/contao/security/advisories/GHSA-jc43-qrrp-98f5
- nvd.nist.gov/vuln/detail/CVE-2019-19714
- contao.org/en/security-advisories/insert-tag-injection-in-the-login-module.html
- github.com/FriendsOfPHP/security-advisories/blob/master/contao/contao/CVE-2019-19714.yaml
- github.com/FriendsOfPHP/security-advisories/blob/master/contao/core-bundle/CVE-2019-19714.yaml
- github.com/contao/contao