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Vulnerability record · CVE-2021-31737 · published 6 May 2021

CVE-2021-31737: Emlog unrestricted file upload vulnerability

Emlog · Emlog

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.

9.8 CVSS 3.1 Critical EPSS 3.9% · top 10.2% CWE-434 · Unrestricted file upload
9.8CVSS 3.1 base score, v2 7.5
3.9%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References, 2 tagged exploit
17 Jun 2026Last modified by NVD

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.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/emlog/emlog/issues/82 ExploitIssue TrackingThird Party Advisory
https://github.com/emlog/emlog/issues/82 ExploitIssue TrackingThird Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2025-29401Emlog code injection vulnerabilityAn arbitrary file upload vulnerability in the component /views/plugin.php of emlog pro v2.5.7 allows attackers to execute arbitrary code via uploadin…EPSS 0.77%9.8CVE-2025-25783Emlog unrestricted file upload vulnerabilityAn arbitrary file upload vulnerability in the component admin\plugin.php of Emlog Pro v2.5.3 allows attackers to execute arbitrary code via uploading…EPSS 0.71%9.8CVE-2023-44973Emlog unrestricted file upload vulnerabilityAn arbitrary file upload vulnerability in the component /content/templates/ of Emlog Pro v2.2.0 allows attackers to execute arbitrary code via upload…EPSS 1.0%9.8CVE-2023-44974Emlog unrestricted file upload vulnerabilityAn arbitrary file upload vulnerability in the component /admin/plugin.php of Emlog Pro v2.2.0 allows attackers to execute arbitrary code via uploadin…EPSS 19%9.8CVE-2023-43291Emlog deserialization of untrusted data vulnerabilityDeserialization of Untrusted Data in emlog pro v.2.1.15 and earlier allows a remote attacker to execute arbitrary code via the cache.php component.EPSS 1.6%9.8CVE-2022-23379Emlog sql injection vulnerabilityEmlog v6.0 was discovered to contain a SQL injection vulnerability via the $TagID parameter of getblogidsfromtagid().EPSS 1.4%9.8CVE-2021-40883Emlog unrestricted file upload vulnerabilityA Remote Code Execution (RCE) vulnerability exists in emlog 5.3.1 via content/plugins.EPSS 3.0%9.8CVE-2020-21585Emlog unrestricted file upload vulnerabilityVulnerability in emlog v6.0.0 allows user to upload webshells via zip plugin module.EPSS 3.2%

Source: NIST National Vulnerability Database (record CVE-2021-31737), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.