Advisory details:
github_osv / GHSA-4v8w-gg5j-ph37
| Advisory ID | github_osv/GHSA-4v8w-gg5j-ph37 |
| Aliases |
CVE-2025-47776
|
| Summary | MantisBT vulnerable to authentication bypass for some passwords due to PHP type juggling Due to an incorrect use of loose (`==`) instead of strict (`===`) comparison in the [authentication code][1], PHP type juggling will cause interpretation of certain MD5 hashes as numbers, specifically those matching scientific notation. [1]: https://github.com/mantisbt/mantisbt/blob/0fb502dd613991e892ed2224ac5ea3e40ba632bc/core/authentication_api.php#L782 ### Impact On MantisBT instances configured to use the *MD5* login method, user accounts having a password hash evaluating to zero (i.e. matching regex `^0+[Ee][0-9]+$`) are vulnerable, allowing an attacker knowing the victim's username to login without knowledge of their actual password, using any other password having a hash evaluating to zero, for example `comito5` (0e579603064547166083907005281618). No password bruteforcing for individual users is needed, thus $g_max_failed_login_count does not protect against the attack. ### Patches * https://github.com/mantisbt/mantisbt/commit/966554a19cf1bdbcfbfb3004766979faa748f9a2 ### Workarounds Check the database for vulnerable accounts, and change those users' passwords, e.g. for MySQL: ```sql SELECT username, email FROM mantis_user_table WHERE password REGEXP '^0+[Ee][0-9]+$' ``` ### References - https://mantisbt.org/bugs/view.php?id=35967 ### Credits Thanks to Harry Sintonen / Reversec for discovering and reporting the issue. |
| Status | Published |
| Exploitability | 0.5 |
| Weighted Severity | 8.2 |
| Risk | 4.1 |
| Affected and Fixed Packages | Package Details |
| Introduced and Fixed Package Commit Patches | Package Commit Patches Details |
| CWE-305 | Authentication Bypass by Primary Weakness |
| CWE-697 | Incorrect Comparison |
| System | Score | Found at |
|---|---|---|
| cvssv3.1 | 9.1 | https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2025/11/GHSA-4v8w-gg5j-ph37/GHSA-4v8w-gg5j-ph37.json |
| cvssv4 | 8.8 | https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2025/11/GHSA-4v8w-gg5j-ph37/GHSA-4v8w-gg5j-ph37.json |
| generic_textual | HIGH |
No EPSS data available for this advisory.
| Patch URL | |
|---|---|
| There are no known patches. | |
| Attack Vector (AV) | Attack Complexity (AC) | Privileges Required (PR) | User Interaction (UI) | Scope (S) | Confidentiality Impact (C) | Integrity Impact (I) | Availability Impact (A) |
|---|---|---|---|---|---|---|---|
network adjacent_network local physical |
low high |
none low high |
none required |
unchanged changed |
high low none |
high low none |
high low none |
| Attack Vector (AV) | Attack Complexity (AC) | Attack Requirements (AT) | Privileges Required (PR) | User Interaction (UI) | Vulnerable System Impact Confidentiality (VC) | Vulnerable System Impact Integrity (VI) | Vulnerable System Impact Availability (VA) | Subsequent System Impact Confidentiality (SC) | Subsequent System Impact Integrity (SI) | Subsequent System Impact Availability (SA) |
|---|---|---|---|---|---|---|---|---|---|---|
network adjacent local physical |
low high |
none present |
none low high |
none passive active |
high low none |
high low none |
high low none |
high low none |
high low none |
high low none |
Vector: SSVCv2/E:N/A:Y/T:P/P:M/B:A/M:M/D:T/2025-11-04T20:41:52Z/
Decision: Track
Source URL: https://github.com/cisagov/vulnrichment/blob/develop/2025/47xxx/CVE-2025-47776.json
Source Advisory: vulnrichment/CVE-2025-47776
[{'Exploitation': 'none'},
{'Automatable': 'yes'},
{'Technical Impact': 'partial'},
{'Mission Prevalence': 'minimal'},
{'Public Well-being Impact': 'material'},
{'Mission & Well-being': 'medium'}]