Any domain/property of Upwork not listed in the targets section is out of scope. This includes any/all subdomains not listed above.

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Ratings/Rewards

For the initial prioritization/rating of findings (with a few exceptions), this program will use the Bugcrowd Vulnerability Rating Taxonomy.

However, it is important to note that in some cases, a vulnerability priority will be modified due to its likelihood or impact. In any instance where an issue is downgraded, a full, detailed explanation will be provided to the researcher - along with the opportunity to appeal and make a case for a higher priority.

Please see Target Information for exclusions specific to this program.

Rewards

Priority	iOS, Android	Web, Desktop, API
P1	$5,000	$2,000
P2	$2,000	$1,200
P3	$600	$400
P4	$250	$100

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Requirements

The following requirements are needed to test - not abiding by these rules may result in you being suspended from testing or being removed from the program.

• User Agent - To participate in the Upwork Bug Bounty please configure your scanner to include bugcrowd in the user-agent string. Failure to do so may result in your IP being temporarily blocked from participation in the program.

• Access / Upwork Account - You can self register for an Upwork account and Upwork API using your @bugcrowdninja.com email address. Testing using any other account is out of scope. Failure to use your @bugcrowdninja.com address may result in your Account being temporarily locked or being suspended from participating in the program.

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Target information

• Please note that the mobile web app is available at: upwork.com/mobile
• Information on the public messaging API is available at: developer.upwork.com and also attached to the listing.
• To view a list of what will likely be the best areas to focus on to find valid and unique findings, please go here
• Android application
• iOS application
• Upwork Developers

Access/credentials

Please sign up for an Upwork account and Upwork API using your @bugcrowdninja.com email address.

• Sign up for Upwork API
• How do I get started as a client?
• Getting Started as a Freelancer

When testing please only test against jobs that you have created - do not test against jobs owned by persons other than yourself

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Exclusions

• All CSRF vulnerabilities will likely be evaluated at P4 level
• Social Engineering
• Uploading of any vulnerability or client-related content to third-party utilities (e.g. Github, DropBox)
• Network-layer D/DoS (If you suspect an application-layer D/DoS, contact Bugcrowd to review the vulnerability. Do not proof-of-concept application-layer D/DoS attacks without prior consent)
• All attack payload data must use professional language (ex: “test” rather than “this has been hacked.”)
• If able to gain access to a system, accounts, users, or user data, stop at the recognition of and report. Do not dive deeper to determine how much more is accessible.
• Vulnerabilities affecting users of outdated browsers, plugin, platforms, or operating systems.

Additionally, the following vulnerabilities are considered too low of an impact, and will be marked as Out of Scope if submitted

Web

• Account/e-mail enumeration using brute-force attacks
• Any low impact issues related to session management (i.e. concurrent sessions, session expiration, password reset/change logout, etc.)
• Bypassing content restrictions in uploading a file without proving the file was received
• Clickjacking/UI redressing
• Incomplete or missing SPF/DMARC/DKIM records
• Issues related to password/credential strength, length, lock outs, or lack of brute-force/rate limiting protections
• Lack of SSL or Mixed content
• Missing Cookie flags
• Reflected file download attacks (RFD)
• Self-exploitation (i.e. password reset links or cookie reuse)
• URL Redirection
• Use of a known-vulnerable library which leads to a low-impact vulnerability (i.e. jQuery outdated version leads to low impact XSS)
• Vulnerabilities affecting users of outdated browsers, plugins or platforms
• Vulnerabilities that allow for the injection of arbitrary text without allowing for hyperlinks, HTML, or JavaScript code to be injected
• Vulnerabilities that require the user/victim to perform extremely unlikely actions (i.e. Self-XSS)

Android

• android:debuggable=”true” in Android Manifest
• android:allowBackup set to true (by default)
• Information disclosure via Toast messages

iOS

• Information leakage in backgrounding snapshots
• Information leakage in keystroke caching

Both

• Copy & Paste disabled for sensitive fields
• Pasteboard data cached
• The application asks for more permission than its needs
• Two-factor authentication bypass that requires physical access to a logged-in device
• Any issue in the mobile app that can only be exploited on a rooted or jailbroken device
• Any issue exploited in the mobile app because an operating system vulnerability
• Local access to user data when operating a rooted mobile device

This list will be updated if we see a particular vuln that is systemic and site wide. Please check this list often. This is for your benefit and to save you the trouble of searching the analytics