CVE-2018-18426
CVE-2018-18426 is a high-severity vulnerability in S-cms 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-94.
Key facts
- Severity: High (CVSS 3.x base score 8.8)
- CVSS v2: 9.0
- EPSS exploit prediction: 2% (82nd percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-94
- Affected product: S-cms
- Published:
- Last modified:
Description
s-cms 3.0 allows remote attackers to execute arbitrary PHP code by placing this code in a crafted User-agent Disallow value in the robots.php txt parameter.
Frequently asked questions
- What is CVE-2018-18426?
- s-cms 3.0 allows remote attackers to execute arbitrary PHP code by placing this code in a crafted User-agent Disallow value in the robots.php txt parameter.
- How severe is CVE-2018-18426?
- CVE-2018-18426 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-2018-18426 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (82nd percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2018-18426?
- CVE-2018-18426 affects S-cms. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2018-18426?
- 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-2018-18426 published?
- CVE-2018-18426 was published on 2018-10-17 and last updated on 2026-06-17.
References
Affected products (1)
- cpe:2.3:a:s-cms:s-cms:3.0:*:*:*:*:*:*:*
More vulnerabilities in S-cms
- CVE-2023-51052 — Critical (CVSS 9.8): S-CMS v5.0 was discovered to contain a SQL injection vulnerability via the A_formauth parameter at /admin/ajax.php.
- CVE-2023-51051 — Critical (CVSS 9.8): S-CMS v5.0 was discovered to contain a SQL injection vulnerability via the A_textauth parameter at /admin/ajax.php.
- CVE-2023-51050 — Critical (CVSS 9.8): S-CMS v5.0 was discovered to contain a SQL injection vulnerability via the A_productauth parameter at /admin/ajax.php.
- CVE-2023-51049 — Critical (CVSS 9.8): S-CMS v5.0 was discovered to contain a SQL injection vulnerability via the A_bbsauth parameter at /admin/ajax.php.
- CVE-2023-51048 — Critical (CVSS 9.8): S-CMS v5.0 was discovered to contain a SQL injection vulnerability via the A_newsauth parameter at /admin/ajax.php.
- CVE-2022-23336 — Critical (CVSS 9.8): S-CMS v5.0 was discovered to contain a SQL injection vulnerability in member_pay.php via the O_id parameter.
Other CWE-94 (Code Injection) vulnerabilities
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- CVE-2026-10134 — Critical (CVSS 10.0): IBM Langflow OSS 1.0.0 through 1.9.3 allows an attacker to read every secret available to the Langflow process, read…
- CVE-2026-53576 — Critical (CVSS 10.0): Kestra is an open-source, event-driven orchestration platform. Prior to 1.0.45 and 1.3.21, the authentication filter…
- CVE-2026-10561 — Critical (CVSS 10.0): IBM Langflow OSS 1.0.0 through 1.9.3 has an vulnerability due to an improper isolation of Python execution combined…
- CVE-2026-25470 — Critical (CVSS 10.0): Improper Control of Generation of Code ('Code Injection') vulnerability in ACPT ACPT (Pro) - Custom Post Types Plugin…
- CVE-2026-48836 — Critical (CVSS 10.0): Unauthenticated Remote Code Execution (RCE) in Easy Invoice <= 2.1.19 versions.