For this program, we're inviting researchers to test our freelancer platform and mobile iOS/Android/Desktop apps. Our goal with this program is to ensure that our customers are using a secure platform that's free of security vulnerabilities.
Please note: Upwork regularly releases new code, updates will be posted in the announcement section highlighting new code. This is a great opportunity for Upwork and the researcher community to work together to find vulnerabilities! Watch for new releases on Upwork's Blog.
Special Bonuses and rewards
Upwork is also offering an extra, one-time $5,000 reward for the ability to break into any of the specified
freelanceraccounts and steal the funds allocated to it. The account is:
- Please provide complete reproduction steps for how you were able to capture the flag
- Bruteforcing credentials to break in is still out of scope as per the regular scoping rules.
- Use of Social Engineering to take-over the account is still out of scope as per the regular scoping rules.
Momentum Bonus, the more you submit, the more you earn!
- There is a 7-day sliding window where you can build momentum on your rewards for the Upwork program. Every accepted bug submitted during this window will earn you a 10% increase on your payout. For example, if you submit 3 bugs in one week the first pays 100%, the second pays 110%, the third pays 120%, etc. this scales to a maximum payout amount of 200% (double reward) the original value.
Out of scope
Any domain/property of Upwork not listed in the targets section is out of scope. This includes any/all subdomains not listed above.
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.
|Priority||iOS, Android||Web, Desktop, API|
The following requirements are needed to test - not abiding by these rules may result in you not being ineligible from receiving the full reward amount or may lead to being suspended from testing and/or removal from the program.
User Agent - To participate in the Upwork Bug Bounty please configure your scanner to include
bugcrowdin 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.comemail address. Testing using any other account is out of scope. Failure to use your
@bugcrowdninja.comaddress may result in your Account being temporarily locked or being suspended from participating in the program.
- 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
- Worth noting, Upwork is designed to help people find jobs and posting/viewing resumes and other PII is a core component of the service. While you may submit findings it must have a clear threat or business impact for Upwork, otherwise it is likely to be marked as won't fix or informational.
Please sign up for an Upwork account and Upwork API using your
@bugcrowdninja.com email address. Only basic/free access is provided by the upwork team for this program, you are welcome to test the API using a paid account but these are not provided at this time.
When testing please only test against jobs that you have created - do not test against jobs owned by persons other than yourself
- 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.
- Github repos not associated with
Additionally, the following vulnerabilities are considered too low of an impact, and will be marked as Out of Scope if submitted
- 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 require the user/victim to perform extremely unlikely actions (i.e. Self-XSS)
- android:debuggable=”true” in Android Manifest
- android:allowBackup set to true (by default)
- Information disclosure via Toast messages
- Information leakage in backgrounding snapshots
- Information leakage in keystroke caching
- 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
Privacy Considerations are OOS