CVE-2021-4422 (GCVE-0-2021-4422)
Vulnerability from cvelistv5 – Published: 2023-07-12 06:52 – Updated: 2026-04-08 17:28
VLAI?
Title
POST SMTP Mailer <= 2.0.20 - Cross-Site Request Forgery Bypass
Summary
The POST SMTP Mailer plugin for WordPress is vulnerable to Cross-Site Request Forgery in versions up to, and including, 2.0.20. This is due to missing or incorrect nonce validation on the handleCsvExport() function. This makes it possible for unauthenticated attackers to trigger a CSV export via a forged request granted they can trick a site administrator into performing an action such as clicking on a link.
Severity ?
4.3 (Medium)
CWE
- CWE-352 - Cross-Site Request Forgery (CSRF)
Assigner
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| saadiqbal | Post SMTP – Complete Email Deliverability and SMTP Solution with Email Logs, Alerts, Backup SMTP & Mobile App |
Affected:
0 , ≤ 2.0.20
(semver)
|
Credits
Jerome Bruandet
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"containers": "{\"adp\": [{\"title\": \"CVE Program Container\", \"references\": [{\"url\": \"https://www.wordfence.com/threat-intel/vulnerabilities/id/e018ca7c-06dd-4d40-91d4-4ed188b8aaf2?source=cve\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://blog.nintechnet.com/25-wordpress-plugins-vulnerable-to-csrf-attacks/\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://blog.nintechnet.com/more-wordpress-plugins-and-themes-vulnerable-to-csrf-attacks/\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://blog.nintechnet.com/multiple-wordpress-plugins-fixed-csrf-vulnerabilities-part-3/\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://blog.nintechnet.com/multiple-wordpress-plugins-fixed-csrf-vulnerabilities-part-2/\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://blog.nintechnet.com/multiple-wordpress-plugins-fixed-csrf-vulnerabilities-part-1/\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://blog.nintechnet.com/multiple-wordpress-plugins-fixed-csrf-vulnerabilities-part-5/\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://blog.nintechnet.com/multiple-wordpress-plugins-fixed-csrf-vulnerabilities-part-4/\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://plugins.trac.wordpress.org/changeset?sfp_email=\u0026sfph_mail=\u0026reponame=\u0026old=2473579%40post-smtp\u0026new=2473579%40post-smtp\u0026sfp_email=\u0026sfph_mail=\", \"tags\": [\"x_transferred\"]}], \"providerMetadata\": {\"orgId\": \"af854a3a-2127-422b-91ae-364da2661108\", \"shortName\": \"CVE\", \"dateUpdated\": \"2024-08-03T17:23:10.780Z\"}}, {\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2021-4422\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2024-10-21T18:10:26.067174Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2024-10-21T18:10:32.935Z\"}}], \"cna\": {\"title\": \"POST SMTP Mailer \u003c= 2.0.20 - Cross-Site Request Forgery Bypass\", \"credits\": [{\"lang\": \"en\", \"type\": \"finder\", \"value\": \"Jerome Bruandet\"}], \"metrics\": [{\"cvssV3_1\": {\"version\": \"3.1\", \"baseScore\": 4.3, \"baseSeverity\": \"MEDIUM\", \"vectorString\": \"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N\"}}], \"affected\": [{\"vendor\": \"saadiqbal\", \"product\": \"Post SMTP \\u2013 Complete Email Deliverability and SMTP Solution with Email Logs, Alerts, Backup SMTP \u0026 Mobile App\", \"versions\": [{\"status\": \"affected\", \"version\": \"0\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"2.0.20\"}], \"defaultStatus\": \"unaffected\"}], \"timeline\": [{\"lang\": \"en\", \"time\": \"2021-03-01T00:00:00.000Z\", \"value\": \"Disclosed\"}], \"references\": [{\"url\": \"https://www.wordfence.com/threat-intel/vulnerabilities/id/e018ca7c-06dd-4d40-91d4-4ed188b8aaf2?source=cve\"}, {\"url\": \"https://blog.nintechnet.com/25-wordpress-plugins-vulnerable-to-csrf-attacks/\"}, {\"url\": \"https://blog.nintechnet.com/more-wordpress-plugins-and-themes-vulnerable-to-csrf-attacks/\"}, {\"url\": \"https://blog.nintechnet.com/multiple-wordpress-plugins-fixed-csrf-vulnerabilities-part-3/\"}, {\"url\": \"https://blog.nintechnet.com/multiple-wordpress-plugins-fixed-csrf-vulnerabilities-part-2/\"}, {\"url\": \"https://blog.nintechnet.com/multiple-wordpress-plugins-fixed-csrf-vulnerabilities-part-1/\"}, {\"url\": \"https://blog.nintechnet.com/multiple-wordpress-plugins-fixed-csrf-vulnerabilities-part-5/\"}, {\"url\": \"https://blog.nintechnet.com/multiple-wordpress-plugins-fixed-csrf-vulnerabilities-part-4/\"}, {\"url\": \"https://plugins.trac.wordpress.org/changeset?sfp_email=\u0026sfph_mail=\u0026reponame=\u0026old=2473579%40post-smtp\u0026new=2473579%40post-smtp\u0026sfp_email=\u0026sfph_mail=\"}], \"descriptions\": [{\"lang\": \"en\", \"value\": \"The POST SMTP Mailer plugin for WordPress is vulnerable to Cross-Site Request Forgery in versions up to, and including, 2.0.20. This is due to missing or incorrect nonce validation on the handleCsvExport() function. This makes it possible for unauthenticated attackers to trigger a CSV export via a forged request granted they can trick a site administrator into performing an action such as clicking on a link.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-352\", \"description\": \"CWE-352 Cross-Site Request Forgery (CSRF)\"}]}], \"providerMetadata\": {\"orgId\": \"b15e7b5b-3da4-40ae-a43c-f7aa60e62599\", \"shortName\": \"Wordfence\", \"dateUpdated\": \"2026-04-08T17:28:38.403Z\"}}}",
"cveMetadata": "{\"cveId\": \"CVE-2021-4422\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-04-08T17:28:38.403Z\", \"dateReserved\": \"2023-07-11T18:37:13.653Z\", \"assignerOrgId\": \"b15e7b5b-3da4-40ae-a43c-f7aa60e62599\", \"datePublished\": \"2023-07-12T06:52:35.453Z\", \"assignerShortName\": \"Wordfence\"}",
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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