CVE-2021-42643
CVE-2021-42643 is a high-severity vulnerability in Cmseasy with a CVSS 3.x base score of 8.8. 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-22.
Key facts
- Severity: High (CVSS 3.x base score 8.8)
- CVSS v2: 6.5
- EPSS exploit prediction: 2% (77th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-22
- Affected product: Cmseasy
- Published:
- Last modified:
Description
cmseasy V7.7.5_20211012 is affected by an arbitrary file write vulnerability. Through this vulnerability, a PHP script file is written to the website server, and accessing this file can lead to a code execution vulnerability.
Frequently asked questions
- What is CVE-2021-42643?
- cmseasy V7.7.5_20211012 is affected by an arbitrary file write vulnerability. Through this vulnerability, a PHP script file is written to the website server, and accessing this file can lead to a code execution vulnerability.
- How severe is CVE-2021-42643?
- CVE-2021-42643 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
- Is CVE-2021-42643 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (77th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2021-42643?
- CVE-2021-42643 affects Cmseasy. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2021-42643?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
- When was CVE-2021-42643 published?
- CVE-2021-42643 was published on 2022-05-17 and last updated on 2026-06-17.
References
Affected products (1)
- cpe:2.3:a:cmseasy:cmseasy:7.7.5_20211012:*:*:*:*:*:*:*
More vulnerabilities in Cmseasy
- CVE-2023-34880 — Critical (CVSS 9.8): cmseasy v7.7.7.7 20230520 was discovered to contain a path traversal vulnerability via the add_action method at…
- CVE-2018-11679 — High (CVSS 8.8): An issue was discovered in CmsEasy 6.1_20180508. There is a CSRF vulnerability that can add an article via…
- CVE-2024-34315 — High (CVSS 7.5): CmsEasy v7.7.7.9 was discovered to contain a local file inclusion vunerability via the file_get_contents function in…
- CVE-2024-31551 — High (CVSS 7.5): Directory Traversal vulnerability in lib/admin/image.admin.php in cmseasy v7.7.7.9 20240105 allows attackers to delete…
- CVE-2020-18406 — High (CVSS 7.5): An issue was discovered in cmseasy v7.0.0 that allows user credentials to be sent in clear text due to no encryption of…
- CVE-2021-42644 — Medium (CVSS 6.5): cmseasy V7.7.5_20211012 is affected by an arbitrary file read vulnerability. After login, the configuration file…
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