How severe is CVE-2021-42840?

CVE-2021-42840 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-2021-42840 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 59% (99th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-42840?

CVE-2021-42840 affects Salesagility Suitecrm. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-42840?

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-2021-42840 published?

CVE-2021-42840 was published on 2021-10-22 and last updated on 2026-06-17.

CVE-2021-42840

CVE-2021-42840 is a high-severity vulnerability in Salesagility Suitecrm with a CVSS 3.x base score of 8.8. Its EPSS exploit-prediction score of 59% places it in the 99th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-434.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v2: 9.0
EPSS exploit prediction: 59% (99th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-434
Affected product: Salesagility Suitecrm
Published: 2021-10-22
Last modified: 2026-06-17

Description

SuiteCRM before 7.11.19 allows remote code execution via the system settings Log File Name setting. In certain circumstances involving admin account takeover, logger_file_name can refer to an attacker-controlled PHP file under the web root, because only the all-lowercase PHP file extensions were blocked. NOTE: this issue exists because of an incomplete fix for CVE-2020-28328.

Frequently asked questions

What is CVE-2021-42840?: SuiteCRM before 7.11.19 allows remote code execution via the system settings Log File Name setting. In certain circumstances involving admin account takeover, logger_file_name can refer to an attacker-controlled PHP file under the web root, because only the all-lowercase PHP file extensions were blocked. NOTE: this issue exists because of an incomplete fix for CVE-2020-28328.
How severe is CVE-2021-42840?: CVE-2021-42840 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-2021-42840 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 59% (99th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-42840?: CVE-2021-42840 affects Salesagility Suitecrm. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-42840?: 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-2021-42840 published?: CVE-2021-42840 was published on 2021-10-22 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:salesagility:suitecrm:*:*:*:*:*:*:*:*

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