GHSA-52cx-vphc-jmjm · Severity: medium · Ecosystem: composer — MantisBT allows XSS in manage_custom_field_edit_page.php
An XSS issue was discovered in manage_custom_field_edit_page.php in MantisBT before 2.25.2. Unescaped output of the return parameter allows an attacker to inject code into a hidden input field.
Conclusion & alert: CVE-2021-33557 is rated High Exploit Risk (65.7/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 0.93%). Core evidence: 1 public exploit reference(s) are indexed (Exploit-DB). Mandatory action: Public exploits are available—assess exposure, apply mitigations, and prioritize patching.
Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.
| EDB-ID | Source | Kind | Published | Link |
|---|---|---|---|---|
| — | nvd_ref | exploit_tag | Exploit-DB ↗ |
EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).
| # | Date | Old EPSS score | New EPSS score | Delta (New - Old) |
|---|---|---|---|---|
| 1 | 2025-11-21 | 1.05% | 0.93% | -0.12% |
| 2 | 2025-11-18 | 0.93% | 1.05% | +0.12% |
| 3 | 2025-06-28 | — | 0.93% | — |
Full EPSS history (13 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 6.1 | 3.1 | MEDIUM |
|
2.8 | 2.7 | [email protected] |
| 4.3 | 2.0 | MEDIUM |
|
8.6 | 2.9 | [email protected] |
GHSA-52cx-vphc-jmjm · Severity: medium · Ecosystem: composer — MantisBT allows XSS in manage_custom_field_edit_page.php
| URL | Tags |
|---|---|
| https://mantisbt.org/blog/archives/mantisbt/699 | Release Notes Vendor Advisory |
| https://mantisbt.org/bugs/view.php?id=28552 | Exploit Vendor Advisory |