CVE-2024-22414: flaskblog XSS — Exploit & Fix

Description

flaskBlog is a simple blog app built with Flask. Improper storage and rendering of the `/user/<user>` page allows a user's comments to execute arbitrary javascript code. The html template `user.html` contains the following code snippet to render comments made by a user: `<div class="content" tag="content">{{comment[2]|safe}}</div>`. Use of the "safe" tag causes flask to _not_ escape the rendered content. To remediate this, simply remove the `|safe` tag from the HTML above. No fix is is available and users are advised to manually edit their installation.

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CVSS v3.1 Score

6.5

MEDIUM

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

Weakness Type (CWE)

CWE-79 Cross-site Scripting (XSS)

Affected Products

Vendor	Product	Versions
dogukanurker	flaskblog	< 1.1.0

References

Advisories & Patches

https://github.com/DogukanUrker/flaskBlog/security/advisories/GHSA-mrcw-j96f-p6v6 https://github.com/DogukanUrker/flaskBlog/security/advisories/GHSA-mrcw-j96f-p6v6

Exploits

https://github.com/DogukanUrker/flaskBlog/security/advisories/GHSA-mrcw-j96f-p6v6 https://github.com/DogukanUrker/flaskBlog/security/advisories/GHSA-mrcw-j96f-p6v6

Frequently Asked Questions

What is CVE-2024-22414? +

flaskBlog is a simple blog app built with Flask. Improper storage and rendering of the `/user/<user>` page allows a user's comments to execute arbitrary javascript code. The html template `user.html` contains the following code snippet to render comments made by a user: `<div class="content" tag="content">{{comment[2]|safe}}</div>`. Use of the "safe" tag causes flask to _not_ escape the rendered content. To remediate this, simply remove the `|safe` tag from the HTML above. No fix is is available and users are advised to manually edit their installation. It has a CVSS v3.1 base score of 6.5 (MEDIUM).

How severe is CVE-2024-22414? +

CVE-2024-22414 has a CVSS v3.1 score of 6.5 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2024-22414? +

CVE-2024-22414 affects products from dogukanurker, specifically: flaskblog. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2024-22414? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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CVE-2024-22414