CVE-2020-26282

Template Injection in BrowserUp Proxy

CRITICAL
10
CVSS Score
Published: December 24, 2020 at 08:45 PM UTC
Updated: June 17, 2026 at 03:07 AM UTC
1 product affected across 1 vendorBrowserup Proxy

Using browserup-proxy by browserup?

Get instant alerts when new vulnerabilities affect browserup-proxy - before attackers find them.

Real-time alertsTrack your software stackFree plan available
Severity
CRITICAL10
Exploit prediction
EPSS 5%

Description

BrowserUp Proxy allows you to manipulate HTTP requests and responses, capture HTTP content, and export performance data as a HAR file. BrowserUp Proxy works well as a standalone proxy server, but it is especially useful when embedded in Selenium tests. A Server-Side Template Injection was identified in BrowserUp Proxy enabling attackers to inject arbitrary Java EL expressions, leading to unauthenticated Remote Code Execution (RCE) vulnerability. This has been patched in version 2.1.2.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 2.1.2
Affected range stops below 2.1.2, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

CVSS

10CRITICALGitHub_M
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-74

Get alerted

Stop reading CVE feeds looking for your own stack

Track the products you run and VulnTracker tells you when a new CVE affects them — with what is known about fixing it, and nothing about the rest.

Free plan, no card