How severe is CVE-2021-39459?

CVE-2021-39459 has a CVSS 3.x base score of 7.2, rated high severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-39459 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (91st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-39459?

CVE-2021-39459 affects Redaxo. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-39459?

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-2021-39459 published?

CVE-2021-39459 was published on 2021-09-09 and last updated on 2026-06-17.

CVE-2021-39459

CVE-2021-39459 is a high-severity vulnerability in Redaxo with a CVSS 3.x base score of 7.2. 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-78.

Key facts

Severity: High (CVSS 3.x base score 7.2)
CVSS v2: 9.0
EPSS exploit prediction: 5% (91st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-78
Affected product: Redaxo
Published: 2021-09-09
Last modified: 2026-06-17

Description

Remote code execution in the modules component in Yakamara Media Redaxo CMS version 5.12.1 allows an authenticated CMS user to execute code on the hosting system via a module containing malicious PHP code.

Frequently asked questions

What is CVE-2021-39459?: Remote code execution in the modules component in Yakamara Media Redaxo CMS version 5.12.1 allows an authenticated CMS user to execute code on the hosting system via a module containing malicious PHP code.
How severe is CVE-2021-39459?: CVE-2021-39459 has a CVSS 3.x base score of 7.2, rated high severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-39459 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (91st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-39459?: CVE-2021-39459 affects Redaxo. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-39459?: 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-2021-39459 published?: CVE-2021-39459 was published on 2021-09-09 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:redaxo:redaxo:5.12.1:*:*:*:*:*:*:*

More vulnerabilities in Redaxo

CVE-2018-18200 — Critical (CVSS 9.8): There is a SQL injection in Benutzerverwaltung in REDAXO before 5.6.4.
CVE-2018-17831 — Critical (CVSS 9.8): In REDAXO before 5.6.3, a critical SQL injection vulnerability has been discovered in the rex_list class because of the…
CVE-2006-2845 — High (CVSS 7.5): PHP remote file inclusion vulnerability in Redaxo 3.0 up to 3.2 allows remote attackers to execute arbitrary PHP code…
CVE-2006-2844 — High (CVSS 7.5): Multiple PHP remote file inclusion vulnerabilities in Redaxo 3.0 allow remote attackers to execute arbitrary PHP code…
CVE-2006-2843 — High (CVSS 7.5): PHP remote file inclusion vulnerability in Redaxo 2.7.4 allows remote attackers to execute arbitrary PHP code via a URL…
CVE-2025-64050 — High (CVSS 7.2): A Remote Code Execution (RCE) vulnerability in the template management component in REDAXO CMS 5.20.0 allows remote…

All CVEs affecting Redaxo →

Other CWE-78 (OS Command Injection) vulnerabilities

CVE-2026-56004 — Critical (CVSS 10.0): A shellcode injection in the mercurial handler of the obs tar_scm source service before version 0.12.4 could be used by…
CVE-2026-56415 — Critical (CVSS 10.0): Storage Concentrator (SC & SCVM) contains a command injection vulnerability within the debug.pl script that is…
CVE-2026-56413 — Critical (CVSS 10.0): Storage Concentrator (SC & SCVM) contains a command injection vulnerability in the ms_service.pl service, which listens…
CVE-2026-49869 — Critical (CVSS 10.0): Kestra is an open-source, event-driven orchestration platform. Prior to 1.0.45 and 1.3.21, AuthenticationFilter in…
CVE-2026-49261 — Critical (CVSS 10.0): MariaDB server is a community developed fork of MySQL server. Versions 10.6.1 through 10.6.26, 10.11.1 through…
CVE-2026-10520 — Critical (CVSS 10.0): An OS Command Injection vulnerability in Ivanti Sentry before the R10.5.2, R10.6.2 and R10.7.1 versions allows a…

Browse all CWE-78 (OS Command Injection) vulnerabilities →