What is CVE-2021-29313?

CVE-2021-29313 is a medium-severity vulnerability in Seacms, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2021-08-17.

How severe is CVE-2021-29313?

Medium severity. CVSS v3 base score is 6.1 out of 10.

XSS in Seacms

CVE-2021-29313

Cross Site Scripting (XSS) vulnerability exists in SeaCMS 12.6 via the (1) v_company and (2) v_tvs parameters in /admin_video.php,

Vulnerability class: XSS (Cross-Site Scripting)

Published 2021-08-17 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.006 (45.2th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 45th percentile — 45.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000

Affected products

Seacms — versions 12.6

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

github.com/ciweiin/seacms/issues/14 (Exploit, Third Party Advisory, Issue Tracking)

Frequently asked questions

What is CVE-2021-29313?: CVE-2021-29313 is a medium-severity vulnerability in Seacms, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2021-08-17.
How severe is CVE-2021-29313?: Medium severity. CVSS v3 base score is 6.1 out of 10.