Machine-written summary
Summary written by Claude Haiku from the source advisory. Not reviewed by a person.
Code16 Sharp versions before 9.22.5 are affected by a stored cross-site scripting flaw in the rich text editor, where the srcdoc attribute on iframe elements is not properly sanitized. An attacker who can edit an Editor field can inject script that runs for other users viewing that content, which could allow session cookie theft or actions taken as an administrator. Upgrade to version 9.22.5, which removes srcdoc from the allowed iframe attributes; until then, the source suggests manually stripping srcdoc attributes from editor field content.
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 |
|---|---|---|---|---|
| 7.3 | High | 3.1 | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N | CNA (GitHub_M) |
- CISA KEV Not listed.
- EPSS 0.0021, the 11th percentile, on 14 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.
Timeline
- 31 Oct 2026, 13:54 UTC First seen by agentprime
- 31 Oct 2026, 13:54 UTC Confirmed by OSV