CVE-2026-35451Twenty: Stored XSS via BlockNote FileBlock
Updated under an hour ago ()
Does this affect you?
It affects twentyhq twenty. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
Do this next
Free account, 1 product
Twenty is an open source CRM. Prior to 1.20.6, a Stored Cross-Site Scripting (XSS) vulnerability exists in the BlockNote editor component. Due to a lack of protocol validation in the FileBlock component and insufficient server-side inspection of block content, an attacker can inject a javascript: URI into the url property of a file block. This allows the execution of arbitrary JavaScript when a user clicks on the malicious file attachment. This vulnerability is fixed in 1.20.6.
- CVSS
- 5.7 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N
- Weakness (CWE)
- CWE-79
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- GitHub_M
- NVD analysis
- Deferred
- Record last updated
- Apr 21, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
twentyhq twenty twentyhq:twenty (from the name) | before 1.20.6 | CNA record |
References
- https://github.com/twentyhq/twenty/security/advisories/GHSA-7w89-7q26-gj7qx-refsource-confirm
- https://github.com/twentyhq/twenty/commit/8da69e0f77ea820a6845a4c3c025b6af3861d523x-refsource-misc
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.