What is CVE-2021-3010?

CVE-2021-3010 is a medium-severity vulnerability in Opentext Content Server, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2021-02-26.

How severe is CVE-2021-3010?

Medium severity. CVSS v3 base score is 5.4 out of 10.

XSS in Opentext Content Server

CVE-2021-3010

There are multiple persistent cross-site scripting (XSS) vulnerabilities in the web interface of OpenText Content Server Version 20.3. The application allows a remote attacker to introduce arbitrary JavaScript by crafting malicious form values that are later not sanitized.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2021-02-26 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.009 (56.9th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 57th percentile — 56.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: 0.000

Affected products

Opentext Content Server — versions 20.3

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

www.opentext.com/products-and-solutions/products/enterprise-content-management/… (Product)
www.exploit-db.com/exploits/49578 (Exploit, VDB Entry, Third Party Advisory)

Frequently asked questions

What is CVE-2021-3010?: CVE-2021-3010 is a medium-severity vulnerability in Opentext Content Server, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2021-02-26.
How severe is CVE-2021-3010?: Medium severity. CVSS v3 base score is 5.4 out of 10.