CVE-2020-12432

MEDIUM

Vereign Collabora CODE <4.2.2 - XSS

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2020-12432. PoCs published by d7x.

AI-analyzed exploit summary This repository describes a stored XSS vulnerability in Collabora CODE's WOPI API, allowing an attacker to steal localStorage data via a crafted link. The PoC involves uploading a malicious HTML file and tricking a victim into accessing it.

Description

The WOPI API integration for Vereign Collabora CODE through 4.2.2 does not properly restrict delivery of JavaScript to a victim's browser, and lacks proper MIME type access control, which could lead to XSS that steals account credentials via cookies or local storage. The attacker must first obtain an API access token, which can be accomplished if the attacker is able to upload a .docx or .odt file. The associated API endpoints for exploitation are /wopi/files and /wopi/getAccessToken.

Exploits (1)

nomisec WRITEUP
by d7x · poc
https://github.com/d7x/CVE-2020-12432

This repository describes a stored XSS vulnerability in Collabora CODE's WOPI API, allowing an attacker to steal localStorage data via a crafted link. The PoC involves uploading a malicious HTML file and tricking a victim into accessing it.

Classification
Writeup 90%
Attack Type
Xss
Complexity
Moderate
Reliability
Reliable
Target: Collabora CODE <= 4.2.2
No auth needed
Prerequisites: Access to the WOPI API interface · Ability to upload a malicious HTML file · Victim interaction required
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (2)

Core 2
Core References
Exploit, Third Party Advisory x_refsource_misc
https://www.youtube.com/watch?v=_tkRnSr6yc0
Exploit, Third Party Advisory x_refsource_misc
https://github.com/d7x/CVE-2020-12432

Scores

CVSS v3 6.1
EPSS 0.0087
EPSS Percentile 54.1%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Details

CWE
CWE-79
Status published
Products (1)
collaboraoffice/collabora_online_development_edition < 4.2.2
Published Jul 21, 2020
Tracked Since Feb 18, 2026