CVE-2021-24574 json
Simple Banner < 2.10.4 - Authenticated Stored XSS
published 2021-08-23 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-11486
- cvss
- 4.8
- 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 52%
- public exploits
- 0
- none known
Summary
The Simple Banner WordPress plugin before 2.10.4 does not sanitise and escape one of its settings, allowing high privilege users such as admin to use Cross-Site Scripting payload even when the unfiltered_html capability is disallowed.
Patch / fix
Exploit prediction
0.68% chance of exploitation in the next 30 days, higher than 52% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- wpscan.com https://wpscan.com/vulnerability/9adf7022-5108-43b7-bf0e-a42593185b74 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 4.8 | CVSS:3.1/AV:N/AC:L/PR:H/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 |
Affected products
- Unknown Simple Banner
Classification
- Weakness
-
- CWE-79 Improper Neutralization of Input During Web Page Generation
- Technology feeds
References
-
plugins.trac.wordpress.org
/changeset/2571047/
patch, third-party-advisory
-
wpscan.com
/vulnerability/9adf7022-5108-43b7-bf0e-a42593185b74
exploit, third-party-advisory
Sources
- CVE List CVE-2021-24574
- NVD CVE-2021-24574
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