CVE-2020-15299 json
A reflected Cross-Site Scripting (XSS) Vulnerability in the KingComposer plugin through 2.9.4 for WordPress allows remote attackers to tric…
published 2020-07-09 6 y ago modified 2026-06-17 4 mo ago also EUVD-2020-7296
- cvss
- 6.1
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 47.0%
- EPSS 47.0% chance of exploitation in 30 days, percentile 98%
- public exploits
- 0
- none known
Summary
A reflected Cross-Site Scripting (XSS) Vulnerability in the KingComposer plugin through 2.9.4 for WordPress allows remote attackers to trick a victim into submitting an install_online_preset AJAX request containing base64-encoded JavaScript (in the kc-online-preset-data POST parameter) that is executed in the victim's browser.
Exploit prediction
46.96% chance of exploitation in the next 30 days, higher than 98% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- wordfence.com https://www.wordfence.com/blog/2020/07/xss-flaw-impacting-100000-sites-patched-in-kingcomposer/ 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
- Technology feeds
References
-
wordfence.com
/blog/2020/07/xss-flaw-impacting-100000-sites-patched-in-kingcomposer/
exploit, third-party-advisory
Sources
- CVE List CVE-2020-15299
- NVD CVE-2020-15299
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.