Impact

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 assigned CVE-2020-26282.

Patches

Effective Immediately, all users should upgrade to version 2.1.2 or higher.

Workarounds

None.

References

https://securitylab.github.com/research/bean-validation-RCE

For more information

If you have any questions or comments about this advisory:

• Open an issue in the BrowserUp Proxy repo
• Contact us via the BrowserUp website or email us at support@browserup.com

References

• GHSA-wmfg-55f9-j8hq
• browserup/browserup-proxy@4b38e7a
• https://github.com/browserup/browserup-proxy/releases/tag/v2.1.2
• https://securitylab.github.com/research/bean-validation-RCE
• https://nvd.nist.gov/vuln/detail/CVE-2020-26282