How severe is CVE-2018-19520?

CVE-2018-19520 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-2018-19520 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (86th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-19520?

CVE-2018-19520 primarily affects Sdcms. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2018-19520?

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-2018-19520 published?

CVE-2018-19520 was published on 2018-11-25 and last updated on 2026-06-17.

CVE-2018-19520

CVE-2018-19520 is a high-severity vulnerability in Sdcms 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: 6.5
EPSS exploit prediction: 3% (86th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-94
Affected product: Sdcms
Published: 2018-11-25
Last modified: 2026-06-17

Description

An issue was discovered in SDCMS 1.6 with PHP 5.x. app/admin/controller/themecontroller.php uses a check_bad function in an attempt to block certain PHP functions such as eval, but does not prevent use of preg_replace 'e' calls, allowing users to execute arbitrary code by leveraging access to admin template management.

Frequently asked questions

What is CVE-2018-19520?: An issue was discovered in SDCMS 1.6 with PHP 5.x. app/admin/controller/themecontroller.php uses a check_bad function in an attempt to block certain PHP functions such as eval, but does not prevent use of preg_replace 'e' calls, allowing users to execute arbitrary code by leveraging access to admin template management.
How severe is CVE-2018-19520?: CVE-2018-19520 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-2018-19520 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (86th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-19520?: CVE-2018-19520 primarily affects Sdcms. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2018-19520?: 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-2018-19520 published?: CVE-2018-19520 was published on 2018-11-25 and last updated on 2026-06-17.

References

Affected products (2)

cpe:2.3:a:sdcms:sdcms:1.6:*:*:*:*:*:*:*
cpe:2.3:a:php:php:*:*:*:*:*:*:*:*

More vulnerabilities in Sdcms

CVE-2019-9651 — Critical (CVSS 9.8): An issue was discovered in SDCMS V1.7. In the \app\admin\controller\themecontroller.php file, the check_bad()…
CVE-2019-9652 — High (CVSS 8.8): There is a CSRF in SDCMS V1.7 via an m=admin&c=theme&a=edit request. It allows PHP code injection by providing a…
CVE-2018-11004 — High (CVSS 8.8): An issue was discovered in SDcms v1.5. Cross-site request forgery (CSRF) vulnerability in…
CVE-2018-19748 — High (CVSS 7.5): app/plug/attachment/controller/admincontroller.php in SDCMS 1.6 allows reading arbitrary files via a…

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Other CWE-94 (Code Injection) vulnerabilities

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CVE-2026-67364 — Critical (CVSS 10.0): Joomla Extension - balbooa.com - Pre-auth PHP Code Injection in Balbooa Forms < 2.4.3.2 - CWE-94 / CWE-95 | CVSS 3.1:…
CVE-2026-73343 — Critical (CVSS 10.0): Unauthenticated Remote Code Execution (RCE) in WP Compress < 7.20.01 versions.
CVE-2026-74253 — Critical (CVSS 10.0): Joomla Extension - regularlabs.com - Unauthenticated RCE through unverified reflected user input in Sourcerer < 14.0.0…
CVE-2026-73678 — Critical (CVSS 10.0): MindsDB Minds Platform version 26.1.0 and earlier contains an unauthenticated remote code execution vulnerability that…

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Threat intelligence

Threat-intel indicators referencing this CVE:

79.137.34.248 (ipv4-addr)
187.51.208.158 (ipv4-addr)
187.141.71.166 (ipv4-addr)
117.247.23.131 (ipv4-addr)
113.164.66.10 (ipv4-addr)
103.38.219.22 (ipv4-addr)
103.38.182.49 (ipv4-addr)
103.20.122.54 (ipv4-addr)