CVE-2021-42840

Q: How do I fix CVE-2021-42840?

Upgrade suitecrm to 7.11.19 or later.

Q: Is CVE-2021-42840 being actively exploited?

Not that we know of. CVE-2021-42840 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 58.9% is the estimated probability that it will be exploited in the next 30 days. That is higher than 99% of all scored CVEs.

Q: How severe is CVE-2021-42840?

CVE-2021-42840 has a CVSS v3 base score of 8.8, rated high. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

Q: What does CVE-2021-42840 affect?

Published advisories record a fix for suitecrm (NVD). Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

HIGHEPSS 99th pctl

8.8

CVSS v3

NVD

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.

CWE-434Unrestricted File Upload

How to fix

Remediation Available

suitecrmNVD

Affected:< 7.11.19Fixed in:7.11.19CVE-2021-42840derived from NVD

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Exploit Intelligence

58.95%probability of exploitation in 30 days

99thpercentile

Very high risk: more likely to be exploited than 99% of all known CVEs.

References

Exploit2

Vendor Advisory2

Third-Party Advisory1

github.com

Related Vulnerabilities

Other CWE-434 (Unrestricted File Upload) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2017-12617	High	8.1	100%	KEV	Fix
CVE-2018-15961	Critical	9.8	100%	KEV	-
CVE-2021-31207	Medium	6.6	100%	KEV + Ransom	Fix
CVE-2017-12615	High	8.1	100%	KEV + Ransom	-
CVE-2025-31324	Critical	10.0	100%	KEV + Ransom	-
CVE-2024-50623	Critical	9.8	99%	KEV + Ransom	Fix

Common questions

How do I fix CVE-2021-42840?

Upgrade suitecrm to 7.11.19 or later.

Is CVE-2021-42840 being actively exploited?

Not that we know of. CVE-2021-42840 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 58.9% is the estimated probability that it will be exploited in the next 30 days. That is higher than 99% of all scored CVEs.

How severe is CVE-2021-42840?

CVE-2021-42840 has a CVSS v3 base score of 8.8, rated high. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

What does CVE-2021-42840 affect?

Published advisories record a fix for suitecrm (NVD). Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

Embed a live status badge for CVE-2021-42840

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.