CVE-2021-33557
CVE-2021-33557 is a medium-severity vulnerability in Mantisbt with a CVSS 3.x base score of 6.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-79.
Key facts
- Severity: Medium (CVSS 3.x base score 6.1)
- CVSS v2: 4.3
- EPSS exploit prediction: 2% (76th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-79
- Affected product: Mantisbt
- Published:
- Last modified:
Description
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.
Frequently asked questions
- What is CVE-2021-33557?
- 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.
- How severe is CVE-2021-33557?
- CVE-2021-33557 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
- Is CVE-2021-33557 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (76th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2021-33557?
- CVE-2021-33557 affects Mantisbt. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2021-33557?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- When was CVE-2021-33557 published?
- CVE-2021-33557 was published on 2021-06-17 and last updated on 2026-06-17.
References
Affected products (1)
- cpe:2.3:a:mantisbt:mantisbt:*:*:*:*:*:*:*:*
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