How severe is CVE-2021-31737?

CVE-2021-31737 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-2021-31737 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (89th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-31737?

CVE-2021-31737 primarily affects Emlog. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-31737?

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-2021-31737 published?

CVE-2021-31737 was published on 2021-05-06 and last updated on 2026-06-17.

CVE-2021-31737

CVE-2021-31737 is a critical-severity vulnerability in Emlog with a CVSS 3.x base score of 9.8. 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-434.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 4% (89th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-434
Affected product: Emlog
Published: 2021-05-06
Last modified: 2026-06-17

Description

emlog v5.3.1 and emlog v6.0.0 have a Remote Code Execution vulnerability due to upload of database backup file in admin/data.php.

Frequently asked questions

What is CVE-2021-31737?: emlog v5.3.1 and emlog v6.0.0 have a Remote Code Execution vulnerability due to upload of database backup file in admin/data.php.
How severe is CVE-2021-31737?: CVE-2021-31737 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-2021-31737 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (89th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-31737?: CVE-2021-31737 primarily affects Emlog. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-31737?: 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-2021-31737 published?: CVE-2021-31737 was published on 2021-05-06 and last updated on 2026-06-17.

References

https://github.com/emlog/emlog/issues/82

Affected products (2)

cpe:2.3:a:emlog:emlog:5.3.1:*:*:*:*:*:*:*
cpe:2.3:a:emlog:emlog:6.0.0:-:*:*:*:*:*:*

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