How severe is CVE-2020-11546?

CVE-2020-11546 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-2020-11546 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 32% (98th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-11546?

CVE-2020-11546 affects Superwebmailer. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-11546?

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-2020-11546 published?

CVE-2020-11546 was published on 2020-07-14 and last updated on 2026-06-17.

CVE-2020-11546

CVE-2020-11546 is a critical-severity vulnerability in Superwebmailer with a CVSS 3.x base score of 9.8. Its EPSS exploit-prediction score of 32% places it in the 98th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-94.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 32% (98th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-94
Affected product: Superwebmailer
Published: 2020-07-14
Last modified: 2026-06-17

Description

SuperWebMailer 7.21.0.01526 is susceptible to a remote code execution vulnerability in the Language parameter of mailingupgrade.php. An unauthenticated remote attacker can exploit this behavior to execute arbitrary PHP code via Code Injection.

Frequently asked questions

What is CVE-2020-11546?: SuperWebMailer 7.21.0.01526 is susceptible to a remote code execution vulnerability in the Language parameter of mailingupgrade.php. An unauthenticated remote attacker can exploit this behavior to execute arbitrary PHP code via Code Injection.
How severe is CVE-2020-11546?: CVE-2020-11546 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-2020-11546 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 32% (98th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-11546?: CVE-2020-11546 affects Superwebmailer. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-11546?: 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-2020-11546 published?: CVE-2020-11546 was published on 2020-07-14 and last updated on 2026-06-17.

References

https://blog.to.com/advisory-superwebmailer-cve-2020-11546/

Affected products (1)

cpe:2.3:a:superwebmailer:superwebmailer:*:*:*:*:*:*:*:*

More vulnerabilities in Superwebmailer

CVE-2023-38193 — High (CVSS 8.8): An issue was discovered in SuperWebMailer 9.00.0.01710. It allows Remote Code Execution via a crafted sendmail command…
CVE-2023-38190 — High (CVSS 8.8): An issue was discovered in SuperWebMailer 9.00.0.01710. It allows Export SQL Injection via the size parameter.
CVE-2024-24131 — Medium (CVSS 6.1): SuperWebMailer v9.31.0.01799 was discovered to contain a reflected cross-site scripting (XSS) vulenrability via the…
CVE-2023-38194 — Medium (CVSS 6.1): An issue was discovered in SuperWebMailer 9.00.0.01710. It allows keepalive.php XSS via a GET parameter.
CVE-2023-38192 — Medium (CVSS 6.1): An issue was discovered in SuperWebMailer 9.00.0.01710. It allows superadmincreate.php XSS via crafted incorrect…
CVE-2023-38191 — Medium (CVSS 6.1): An issue was discovered in SuperWebMailer 9.00.0.01710. It allows spamtest_external.php XSS via a crafted filename.

All CVEs affecting Superwebmailer →

Other CWE-94 (Code Injection) vulnerabilities

CVE-2026-57624 — Critical (CVSS 10.0): Unauthenticated Remote Code Execution (RCE) in Blocksy Companion Pro <= 2.1.46 versions.
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.

Browse all CWE-94 (Code Injection) vulnerabilities →