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Vulnerability record · CVE-2020-24033 · published 22 October 2020

CVE-2020-24033: Fs s3900 24t4s firmware cross-site request forgery vulnerability

FFs · S3900 24t4s Firmware

An issue was discovered in fs.com S3900 24T4S 1.7.0 and earlier. The form does not have an authentication or token authentication mechanism that allows remote attackers to forge requests on behalf of a site administrator to change all settings including deleting users, creating new users with escalated privileges.

8.8 CVSS 3.1 High EPSS 0.97% · top 39.6% CWE-352 · Cross-site request forgery
8.8CVSS 3.1 base score, v2 6.8
0.97%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
4References, 4 tagged exploit
17 Jun 2026Last modified by NVD

Description

An issue was discovered in fs.com S3900 24T4S 1.7.0 and earlier. The form does not have an authentication or token authentication mechanism that allows remote attackers to forge requests on behalf of a site administrator to change all settings including deleting users, creating new users with escalated privileges.

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/M0NsTeRRR/CVE-2020-24033 ExploitThird Party Advisory
https://github.com/M0NsTeRRR/S3900-24T4S-CSRF-vulnerability ExploitThird Party Advisory
https://github.com/M0NsTeRRR/CVE-2020-24033 ExploitThird Party Advisory
https://github.com/M0NsTeRRR/S3900-24T4S-CSRF-vulnerability ExploitThird Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2020-24033), CISA KEV, FIRST EPSS (scores of 2026-09-28). This page is refreshed as NVD updates the record.