CVE-2020-6519

MEDIUM

Google Chrome <84.0.4147.89 - Auth Bypass

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 2 public exploits for CVE-2020-6519. PoCs published by Gal Weizman, PerimeterX.

AI-analyzed exploit summary This exploit demonstrates a full CSP (Content Security Policy) bypass in Chromium 83 by dynamically injecting malicious objects, iframes, and scripts via JavaScript. It leverages a vulnerability in the handling of 'javascript:' URIs in iframes to execute arbitrary code, bypassing CSP restrictions.

Description

Policy bypass in CSP in Google Chrome prior to 84.0.4147.89 allowed a remote attacker to bypass content security policy via a crafted HTML page.

Exploits (2)

exploitdb WORKING POC
by Gal Weizman · javascriptlocalmultiple
https://www.exploit-db.com/exploits/49195

This exploit demonstrates a full CSP (Content Security Policy) bypass in Chromium 83 by dynamically injecting malicious objects, iframes, and scripts via JavaScript. It leverages a vulnerability in the handling of 'javascript:' URIs in iframes to execute arbitrary code, bypassing CSP restrictions.

Classification
Working Poc 95%
Attack Type
Xss
Complexity
Moderate
Reliability
Reliable
Target: Chromium 83
No auth needed
Prerequisites: Victim must visit a malicious webpage or a page with injected malicious script
MITRE ATT&CK
devstral-2 · analyzed Feb 16, 2026 Full analysis →
nomisec WORKING POC 26 stars
by PerimeterX · poc
https://github.com/PerimeterX/CVE-2020-6519

This repository contains a functional proof-of-concept exploit for CVE-2020-6519, a Chromium CSP bypass vulnerability. The exploit leverages a JavaScript iframe injection technique to bypass Content Security Policy restrictions, allowing the execution of scripts from unauthorized sources.

Classification
Working Poc 95%
Attack Type
Xss
Complexity
Moderate
Reliability
Reliable
Target: Chromium-based browsers (Chrome, Opera, Edge) versions 73-83
No auth needed
Prerequisites: Victim must visit a malicious or compromised webpage · Browser version must be vulnerable (Chrome 73-83)
MITRE ATT&CK
devstral-2 · analyzed Feb 18, 2026 Full analysis →

References (11)

Core 11
Core References
Permissions Required, Vendor Advisory x_refsource_misc
https://crbug.com/1064676
Mailing List, Third Party Advisory vendor-advisory x_refsource_suse
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00069.html
Third Party Advisory vendor-advisory x_refsource_gentoo
https://security.gentoo.org/glsa/202007-08
Mailing List, Third Party Advisory vendor-advisory x_refsource_suse
http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00007.html
Mailing List, Third Party Advisory vendor-advisory x_refsource_suse
http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00018.html
Mailing List, Third Party Advisory vendor-advisory x_refsource_suse
http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00041.html
Exploit, Third Party Advisory, VDB Entry x_refsource_misc
http://packetstormsecurity.com/files/160353/Chromium-83-CSP-Bypass.html
Third Party Advisory vendor-advisory x_refsource_debian
https://www.debian.org/security/2021/dsa-4824

Scores

CVSS v3 6.5
EPSS 0.1132
EPSS Percentile 95.4%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N

Details

Status published
Products (7)
debian/debian_linux 10.0
fedoraproject/fedora 31
fedoraproject/fedora 32
google/chrome < 84.0.4147.89
opensuse/backports_sle 15.0 sp1 (2 CPE variants)
opensuse/leap 15.1
opensuse/leap 15.2
Published Jul 22, 2020
Tracked Since Feb 18, 2026