What is the CVSS score of CVE-2020-19891?

CVE-2020-19891 has a CVSS 3.1 base score of 7.2 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 1.4%.

Is there a public PoC exploit available for CVE-2020-19891?

Yes, a public proof-of-concept exploit is available for CVE-2020-19891. Prioritise patching immediately. EPSS: 1.4%.

PHP CVE-2020-19891

HIGH

Out-of-bounds Write (CWE-787)

2020-08-24 cve@mitre.org

PHP Buffer Overflow Memory Corruption Dbhcms Dbhcms Project

7.2

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

7.2 HIGH

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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector

Network

Attack Complexity

Low

Privileges Required

High

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

CVE Published

Aug 24, 2020 - 15:15 nvd

HIGH 7.2

DescriptionNVD

DBHcms v1.2.0 has an Arbitrary file write vulnerability in dbhcms\mod\mod.editor.php $_POST['updatefile'] is filename and $_POST['tinymce_content'] is file content, there is no filter function for security. A remote authenticated admin user can exploit this vulnerability to get a webshell.

AnalysisAI

DBHcms v1.2.0 has an Arbitrary file write vulnerability in dbhcms\mod\mod.editor.php $_POST['updatefile'] is filename and $_POST['tinymce_content'] is file content, there is no filter function for. Rated high severity (CVSS 7.2), this vulnerability is remotely exploitable, low attack complexity. Public exploit code available and no vendor patch available.

Technical ContextAI

This vulnerability is classified as Out-of-bounds Write (CWE-787), which allows attackers to write data beyond allocated buffer boundaries leading to code execution or crashes. DBHcms v1.2.0 has an Arbitrary file write vulnerability in dbhcms\mod\mod.editor.php $_POST['updatefile'] is filename and $_POST['tinymce_content'] is file content, there is no filter function for security. A remote authenticated admin user can exploit this vulnerability to get a webshell. Affected products include: Dbhcms Project Dbhcms.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Validate write boundaries, use memory-safe languages, enable compiler protections (ASLR, stack canaries).