FluentSMTP < 2.0.1 - Authenticated Stored XSS
Priority LOW 25CWE-79Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Cross-site scripting
- Confidentiality · integrity · availability
- Low · Low · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-79.
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.
Why it matters now
EPSS 0.00624 50th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed FluentSMTP – WordPress Mail SMTP, SES, SendGrid, Mailgun and Any SMTP Plugin (Unknown): 2.0.1
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Unknown | FluentSMTP – WordPress Mail SMTP, SES, SendGrid, Mailgun and Any SMTP Plugin | 2.0.1 to before 2.0.1 | 2.0.1 | Patch available | CNA |
- FluentSMTP – WordPress Mail SMTP, SES, SendGrid, Mailgun and Any SMTP Plugin VendorUnknown Affected 2.0.1 to before 2.0.1 Fixed in 2.0.1 Patch available CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:wpmanageninja:fluentsmtp:*:*:*:*:*:wordpress:*:* | before 2.0.1 | Vulnerable | WP ManageNinja LLC |
- cpe:2.3:a:wpmanageninja:fluentsmtp:*:*:*:*:*:wordpress:*:* Versions before 2.0.1 Vulnerable ·WP ManageNinja LLC
Remediation
- Fix · CNA FluentSMTP – WordPress Mail SMTP, SES, SendGrid, Mailgun and Any SMTP Plugin (Unknown) Fixed in 2.0.1
Timeline
- 2026-10-02 Threatist record created from CVE-2021-24528
- 2026-10-03 Alias added: GHSA-vcw9-mv32-wmgq
- 2026-11-04 EPSS moved to the 50th–90th percentile
References
More WP ManageNinja LLC Fluentsmtp vulnerabilities
- TI-2023-00211 FluentSMTP < 2.2.3 - Stored XSS via Email Logs CVSS 3.1MEDIUM 5.4
- TI-2023-02893 FluentSMTP <= 2.2.4 - Unauthenticated Stored Cross-Site Scripting via Email Subject CVSS 3.1HIGH 7.2
Sources
- CVE-2021-24528 · CVE Program
- CVE-2021-24528 · NVD
- FIRST EPSS
- GHSA-vcw9-mv32-wmgq · GitHub Advisory Database · CC BY 4.0
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