CVE-2021-21920

Name: CVE-2021-21920
Creator: NVD / NIST
Published: 2021-12-22T19:15:10.32+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 4.9/10EPSS 1.13%

Last modified Jun 17, 2026

CVE-2021-21920 is a medium-severity vulnerability rated 4.9/10 on the CVSS scale. A specially-crafted HTTP request can lead to SQL injection. An attacker can make authenticated HTTP requests to trigger this vulnerability at ‘surname_filter’ parameter with the administrative account or through cross-site request forgery.. EPSS estimates a 1.13% chance of exploitation in the next 30 days.

Description

A specially-crafted HTTP request can lead to SQL injection. An attacker can make authenticated HTTP requests to trigger this vulnerability at ‘surname_filter’ parameter with the administrative account or through cross-site request forgery.

Metrics

CVSS 3.1

4.9/10

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

EPSS Probability

1.13%

62.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Advantech	R-Seenet	2.4.15

References

https://talosintelligence.com/vulnerability_reports/TALOS-2021-1365Exploit, Third Party Advisory
https://talosintelligence.com/vulnerability_reports/TALOS-2021-1365Exploit, Third Party Advisory

Timeline

Published: Dec 22, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-21920?

How severe is CVE-2021-21920?

CVE-2021-21920 has a CVSS score of 4.9/10 (MEDIUM severity). The EPSS model estimates a 1.13% probability of exploitation in the next 30 days.

How do I fix CVE-2021-21920?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-21920?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST