Bug bounty reports15,219
Publicly disclosed HackerOne reports, with the platform's own outcome and severity.
| Report | Status | Weakness | Severity | Disclosed | Bounty | Votes |
|---|---|---|---|---|---|---|
| broken authentication#23921 | Valid | Authentication | – | 2014-09-21 | – | 6 |
| Unauthenticated HTML Injection Stored - ContactUs form#768327 | Valid | No weakness recorded | Medium | 2020-09-25 | – | 6 |
| Fetching the update json scheme from concrete5 over HTTP leads to remote code execution#982130 | Valid | Cryptography | High | 2021-09-22 | – | 6 |
| XSS in private message#4826 | Valid | Cross-site Scripting | – | 2014-05-14 | – | 7 |
| Stored XSS in Express Objects - Concrete5 v8.1.0#221325 | Valid | No weakness recorded | – | 2017-05-17 | – | 7 |
| Stored XSS in Name field in User Groups/Group Details form#247521 | Valid | Cross-site Scripting | Low | 2017-08-17 | – | 7 |
| Stored XSS vulnerability in additional URLs in 'Location' dialog [Sitemap]#251358 | Valid | Cross-site Scripting | Low | 2017-11-02 | – | 7 |
| Stored XSS on Add Event in Calendar#300532 | Valid | Cross-site Scripting | Low | 2018-09-01 | – | 7 |
| Stored XSS on Add Calendar#300571 | Valid | Cross-site Scripting | Low | 2018-09-01 | – | 7 |
| SSRF - pivoting in the private LAN#1364797 | Valid | Server-Side Request Forgery | Low | 2022-11-25 | – | 7 |
| Stored XSS in Private Messages 'Reply' allows to execute malicious JavaScript against any user while replying to the message which contains payload#247517 | Valid | Cross-site Scripting | High | 2017-08-17 | – | 8 |
| Stored XSS in the file search filter#873584 | Valid | Cross-site Scripting | Low | 2020-07-03 | – | 8 |
| Stored XSS in Pages SEO dialog Name field (concrete5 8.1.0)#230029 | Valid | Cross-site Scripting | Medium | 2017-07-27 | – | 9 |
| Stored XSS vulnerability in RSS Feeds Description field#248133 | Valid | Cross-site Scripting | Low | 2017-08-18 | – | 9 |
| HttpOnly flag not set for cookie on concrete5.org#4792 | Valid | Misconfiguration and Insecure Design | – | 2014-04-16 | – | 10 |
| Stored unauth XSS in calendar event via CSRF#1102018 | Valid | Cross-site Scripting | Medium | 2021-10-15 | – | 10 |
| A bypass of adding remote files in concrete5 FIlemanager leads to remote code execution#1350444 | Valid | No weakness recorded | Medium | 2021-11-11 | – | 10 |
| SSRF mitigation bypass using DNS Rebind attack#1369312 | Valid | Server-Side Request Forgery | Low | 2022-11-25 | – | 10 |
| Bypass auth.email-domains#4795 | Valid | Authentication | – | 2014-04-30 | – | 11 |
| Local File Inclusion Vulnerability in Concrete5 version 5.7.3.1#59665 | Valid | Misconfiguration and Insecure Design | – | 2016-06-26 | – | 11 |
| CSRF Full Account Takeover#152052 | Valid | Cross-Site Request Forgery | – | 2016-08-12 | – | 11 |
| Stored XSS in Headline TextControl element in Express forms [ concrete5 8.1.0 ]#230278 | Valid | Cross-site Scripting | Medium | 2017-07-14 | – | 12 |
| Unauthenticated reflected XSS in preview_as_user function#643442 | Valid | Cross-site Scripting | Medium | 2019-12-06 | – | 12 |
| Local File Inclusion path bypassAnalysed#147570 | Valid | Misconfiguration and Insecure Design | – | 2016-08-19 | – | 13 |
| Cross Site Scripting (XSS) Stored - Private messagingAnalysed#768313 | Valid | Cross-site Scripting | Low | 2020-09-25 | – | 15 |
| SSRF bypassAnalysed#863221 | Valid | Server-Side Request Forgery | Low | 2021-10-04 | – | 15 |
| Remote Code Execution through Extension Bypass on Log FunctionalityAnalysed#841947 | Valid | Command and Code Injection | High | 2020-07-03 | – | 16 |
| Reflected XSS vulnerability in Database name field on installation screenAnalysed#289330 | Valid | Cross-site Scripting | Low | 2018-01-20 | – | 18 |
| Authenticated path traversal to RCEAnalysed#1102067 | Valid | File and Path Handling | High | 2021-10-15 | – | 18 |
| SSRF thru File ReplaceAnalysed#243865 | Valid | Server-Side Request Forgery | – | 2018-01-06 | – | 19 |
| XSS in select attribute optionsAnalysed#753567 | Valid | Cross-site Scripting | Low | 2020-04-29 | – | 20 |
| 'cnvID' parameter vulnerable to Insecure Direct Object ReferencesAnalysed#265284 | Valid | Insecure Direct Object Reference | Critical | 2018-04-15 | – | 22 |
| SVG file that HTML Included is able to upload via File ManagerAnalysed#437863 | Valid | Cross-site Scripting | Low | 2019-04-20 | – | 26 |
| Arbitrary File delete via PHAR deserializationAnalysed#921288 | Valid | Deserialization and Object Injection | High | 2021-10-20 | – | 28 |
| Time-base SQL Injection in Search UsersAnalysed#876800 | Valid | SQL Injection | Medium | 2020-08-05 | – | 60 |
| Password Reset link hijacking via Host Header PoisoningAnalysed#226659 | Valid | Access Control | None | 2017-06-06 | – | 73 |
| Remote Code Execution (Reverse Shell) - File ManagerAnalysed#768322 | Valid | Command and Code Injection | Medium | 2020-07-21 | – | 114 |
Status and severity are HackerOne's. “Access stated” is what the title says; “Access needed” and techniques come from CyberSIXT's analysis of the public report, where there is one, which can be wrong. Data as of 2026-11-15.