jersou Markdown Explorer 0.1.1 Markdown File cross site scripting

Summaryinfo

A vulnerability marked as problematic has been reported in jersou Markdown Explorer 0.1.1. This issue affects some unknown processing of the component Markdown File Handler. This manipulation causes cross site scripting. This vulnerability appears as CVE-2021-47836. The attack may be initiated remotely. In addition, an exploit is available.

Detailsinfo

A vulnerability has been found in jersou Markdown Explorer 0.1.1 and classified as problematic. Affected by this vulnerability is an unknown code of the component Markdown File Handler. The manipulation with an unknown input leads to a cross site scripting vulnerability. The CWE definition for the vulnerability is CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. As an impact it is known to affect integrity. The summary by CVE is:

Markdown Explorer 0.1.1 contains a cross-site scripting vulnerability that allows attackers to inject malicious code through file uploads and editor inputs. Attackers can upload markdown files with embedded JavaScript payloads that execute in the application's privileged renderer context, allowing code execution on the host.

The weakness was presented by TaurusOmar as 49826. The advisory is shared at exploit-db.com. This vulnerability is known as CVE-2021-47836 since 01/14/2026. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. It demands that the victim is doing some kind of user interaction. Technical details are unknown but a public exploit is available. MITRE ATT&CK project uses the attack technique T1059.007 for this issue.

It is possible to download the exploit at exploit-db.com. It is declared as proof-of-concept.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at Exploit-DB (49826). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Vendor

• jersou

Name

• Markdown Explorer

Version

• 0.1.1

CPE 2.3info

• 🔒

CPE 2.2info

• 🔒

CVSSv4info

CVSSv3info

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Entryinfo

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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