CVE-2020-8548 json
massCode 1.0.0-alpha.6 allows XSS via crafted Markdown text, with resultant remote code execution (because nodeIntegration in webPreference…
published 2020-02-03 6 y ago modified 2026-06-17 4 mo ago also EUVD-2020-29414
- cvss
- 6.1
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.4%
- EPSS 1.4% chance of exploitation in 30 days, percentile 73%
- public exploits
- 0
- none known
Summary
massCode 1.0.0-alpha.6 allows XSS via crafted Markdown text, with resultant remote code execution (because nodeIntegration in webPreferences is true).
Exploit prediction
1.44% chance of exploitation in the next 30 days, higher than 73% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- github.com https://github.com/antonreshetov/massCode/issues/44 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 6.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
| NVD | 2.0 | 4.3 | AV:N/AC:M/Au:N/C:N/I:P/A:N |
Classification
- Weakness
-
- CWE-79 Improper Neutralization of Input During Web Page Generation
References
-
github.com
/antonreshetov/massCode/issues/44
exploit, third-party-advisory
-
github.com
/antonreshetov/massCode/issues/43
not-applicable
Sources
- CVE List CVE-2020-8548
- NVD CVE-2020-8548
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.