CVE-2021-3010

MEDIUM

OpenText Content Server <20.3 - XSS

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2021-3010. PoCs published by Kamil Breński.

AI-analyzed exploit summary This exploit demonstrates two stored XSS vulnerabilities in OpenText Content Server 20.3. The first involves injecting malicious JavaScript via document version comments, while the second abuses the project banner URL field to execute arbitrary JavaScript when clicked.

Description

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.

Exploits (1)

exploitdb WORKING POC
by Kamil Breński · textwebappsmultiple
https://www.exploit-db.com/exploits/49578

This exploit demonstrates two stored XSS vulnerabilities in OpenText Content Server 20.3. The first involves injecting malicious JavaScript via document version comments, while the second abuses the project banner URL field to execute arbitrary JavaScript when clicked.

Classification
Working Poc 95%
Attack Type
Xss
Complexity
Trivial
Reliability
Reliable
Target: OpenText Content Server 20.3
Auth required
Prerequisites: Valid user credentials with permissions to create document versions or modify project banners
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (2)

Core 2
Core References
Exploit, Third Party Advisory, VDB Entry x_refsource_misc
https://www.exploit-db.com/exploits/49578

Scores

CVSS v3 5.4
EPSS 0.0086
EPSS Percentile 53.8%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Details

CWE
CWE-79
Status published
Products (1)
opentext/content_server 20.3
Published Feb 26, 2021
Tracked Since Feb 18, 2026