CVE-2021-20103
CVE-2021-20103 is a medium-severity vulnerability in Machform 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: 1% (48th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-79
- Affected product: Machform
- Published:
- Last modified:
Description
Machform prior to version 16 is vulnerable to stored cross-site scripting due to insufficient sanitization of file attachments uploaded with forms through upload.php.
Frequently asked questions
- What is CVE-2021-20103?
- Machform prior to version 16 is vulnerable to stored cross-site scripting due to insufficient sanitization of file attachments uploaded with forms through upload.php.
- How severe is CVE-2021-20103?
- CVE-2021-20103 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-2021-20103 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (48th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2021-20103?
- CVE-2021-20103 affects Machform. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2021-20103?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- When was CVE-2021-20103 published?
- CVE-2021-20103 was published on 2021-06-29 and last updated on 2026-06-17.
References
Affected products (1)
- cpe:2.3:a:machform:machform:*:*:*:*:*:*:*:*
More vulnerabilities in Machform
- CVE-2024-37762 — Critical (CVSS 9.9): MachForm up to version 21 is affected by an authenticated unrestricted file upload which leads to a remote code…
- CVE-2018-6411 — Critical (CVSS 9.8): An issue was discovered in Appnitro MachForm before 4.2.3. When the form is set to filter a blacklist, it automatically…
- CVE-2018-6410 — Critical (CVSS 9.8): An issue was discovered in Appnitro MachForm before 4.2.3. There is a download.php SQL injection via the q parameter.
- CVE-2024-37765 — High (CVSS 8.8): Machform up to version 19 is affected by an authenticated Blind SQL injection in the user account settings page.
- CVE-2021-20102 — High (CVSS 8.8): Machform prior to version 16 is vulnerable to cross-site request forgery due to a lack of CSRF tokens in place.
- CVE-2021-20104 — High (CVSS 8.1): Machform prior to version 16 is vulnerable to unauthenticated remote code execution due to insufficient sanitization of…
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