Machine-written summary
Summary written by Claude Haiku from the source advisory. Not reviewed by a person.
Umbraco.Cms.Core and Umbraco.Cms.Web.BackOffice versions from 13.0.0 before 13.1.1 keep logs of failing webhooks when the site is not in debug mode, and those logs can contain sensitive information. The source gives few details on who can read the logs or what the information includes. Upgrade to 13.1.1, or disable the webhooks functionality as a workaround.
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 |
|---|---|---|---|---|
| 4.1 | Medium | 3.1 | CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:N/A:N | CNA (GitHub_M) |
- CISA KEV Not listed.
- EPSS 0.0043, the 37th percentile, on 11 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.
Timeline
- 17 Apr 2024, 10:46 UTC Published by the maintainers as a GitHub repository advisory
- 31 Oct 2026, 15:21 UTC First seen by agentprime
- 31 Oct 2026, 15:21 UTC Confirmed by OSV