CVE-2021-26834 json
A cross-site scripting (XSS) vulnerability exists in Znote 0.5.2.
published 2021-06-18 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-13618
- cvss
- 5.4
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.7%
- EPSS 0.7% chance of exploitation in 30 days, percentile 53%
- public exploits
- 0
- none known
Summary
A cross-site scripting (XSS) vulnerability exists in Znote 0.5.2. An attacker can insert payloads, and the code execution will happen immediately on markdown view mode.
Exploit prediction
0.69% chance of exploitation in the next 30 days, higher than 53% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- github.com https://github.com/alagrede/znote-app/issues/5 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 5.4 | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N |
| NVD | 2.0 | 3.5 | AV:N/AC:M/Au:S/C:N/I:P/A:N |
Classification
- Weakness
-
- CWE-79 Improper Neutralization of Input During Web Page Generation
References
-
github.com
/alagrede/znote-app/issues/5
exploit, issue-tracking, third-party-advisory
-
electronjs.org
/apps/znote
product
Sources
- CVE List CVE-2021-26834
- NVD CVE-2021-26834
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.