CVE-2021-3293

published 2021-02-08

CVE-2021-3293: emlog v5.3.1 has full path disclosure vulnerability in t/index.php, which allows an attacker to see the path to the webroot/file.

Priority P3 44 medium 5.3 CVSS 3.1

AV N AC L PR N UI N S U C L I N A N

EXPLOIT

emlog v5.3.1 has full path disclosure vulnerability in t/index.php, which allows an attacker to see the path to the webroot/file.

Affected

1 ranges

Vendor	Product	Version range	Fixed in
emlog	emlog	—	—

Detection & IOCs extracted from sources · hover to see the quote

url /t/index.php?action[]=aaaa↗

path /t/index.php↗

• → Send a GET request to /t/index.php with an array-type action parameter (e.g., action[]=aaaa). A vulnerable emlog 5.3.1 instance will respond HTTP 200 and include PHP warning strings 'Warning', 'on line', and 'expects parameter' in the response body, disclosing the full server path. ↗
• → Match response body for all three strings simultaneously: 'Warning', 'on line', and 'expects parameter' (AND condition) with HTTP status 200 to confirm exploitation of the full path disclosure. ↗

• · The vulnerability is version-specific — only emlog v5.3.1 is confirmed affected. The path disclosure is triggered by passing an array value to the 'action' parameter, causing PHP to emit a warning that leaks the webroot path. ↗

CVSS provenance

nvd v3.1 5.3 MEDIUM CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

nvd v2.0 5.0 MEDIUM AV:N/AC:L/Au:N/C:P/I:N/A:N

CVEs like this are exactly what “Exploited This Week” covers.

Every Monday: what got weaponized or added to CISA KEV in the last seven days — each CVE cross-linked to its PoC, Nuclei template, and detection rule. Free, one email a week, unsubscribe in one click.

CWE-22