CVE-2021-41403
CVE-2021-41403 is a critical-severity vulnerability in Flatcore Flatcore-cms with a CVSS 3.x base score of 9.8. Its EPSS exploit-prediction score of 18% places it in the 97th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-918.
Key facts
- Severity: Critical (CVSS 3.x base score 9.8)
- CVSS v2: 7.5
- EPSS exploit prediction: 18% (97th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-918
- Affected product: Flatcore Flatcore-cms
- Published:
- Last modified:
Description
flatCore-CMS version 2.0.8 calls dangerous functions, causing server-side request forgery vulnerabilities.
Frequently asked questions
- What is CVE-2021-41403?
- flatCore-CMS version 2.0.8 calls dangerous functions, causing server-side request forgery vulnerabilities.
- How severe is CVE-2021-41403?
- CVE-2021-41403 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
- Is CVE-2021-41403 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 18% (97th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2021-41403?
- CVE-2021-41403 affects Flatcore Flatcore-cms. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2021-41403?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
- When was CVE-2021-41403 published?
- CVE-2021-41403 was published on 2022-06-15 and last updated on 2026-06-17.
References
Affected products (1)
- cpe:2.3:a:flatcore:flatcore-cms:2.0.8:*:*:*:*:*:*:*
More vulnerabilities in Flatcore Flatcore-cms
- CVE-2017-7878 — Critical (CVSS 9.8): SQL Injection vulnerability in flatCore version 1.4.6 allows an attacker to read and write to the users database.
- CVE-2021-41402 — High (CVSS 8.8): flatCore-CMS v2.0.8 has a code execution vulnerability, which could let a remote malicious user execute arbitrary PHP…
- CVE-2017-7877 — High (CVSS 8.8): CSRF vulnerability in flatCore version 1.4.6 allows remote attackers to modify CMS configurations.
- CVE-2017-8868 — High (CVSS 7.5): acp/core/files.browser.php in flatCore 1.4.7 allows file deletion via directory traversal in the delete parameter to…
- CVE-2017-7879 — High (CVSS 7.5): SQL Injection vulnerability in flatCore version 1.4.6 allows an attacker to read the content database.
- CVE-2021-39608 — High (CVSS 7.2): Remote Code Execution (RCE) vulnerabilty exists in FlatCore-CMS 2.0.7 via the upload addon plugin, which could let a…
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