CVE-2021-24528 json
FluentSMTP < 2.0.1 - Authenticated Stored XSS
published 2021-08-30 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-11440
- cvss
- 5.4
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.6%
- EPSS 0.6% chance of exploitation in 30 days, percentile 50%
- public exploits
- 0
- none known
Summary
The FluentSMTP WordPress plugin before 2.0.1 does not sanitize parameters before storing the settings in the database, nor does the plugin escape the values before outputting them when viewing the SMTP settings set by this plugin, leading to a stored cross site scripting (XSS) vulnerability. Only users with roles capable of managing plugins can modify the plugin's settings.
Patch / fix
- wpmanageninja fluentsmtp 2.0.1
Exploit prediction
0.62% chance of exploitation in the next 30 days, higher than 50% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- wpscan.com https://wpscan.com/vulnerability/8b8d316b-96b2-4cdc-9da5-c9ea6108a85b 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 |
Affected products
- Unknown FluentSMTP – WordPress Mail SMTP, SES, SendGrid, Mailgun and Any SMTP Plugin
Classification
- Weakness
-
- CWE-79 Improper Neutralization of Input During Web Page Generation
- Technology feeds
References
-
wpscan.com
/vulnerability/8b8d316b-96b2-4cdc-9da5-c9ea6108a85b
exploit, third-party-advisory
Sources
- CVE List CVE-2021-24528
- NVD CVE-2021-24528
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