PT-2025-33302 · Flaskblog · Flaskblog

Calebudd · Published 2025-08-14 · Updated 2025-08-21 · CVE-2025-53631

Positive Technologies (AI Summary)

CVSS v3.1

5.4

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions: flaskBlog versions prior to 2.8.1

Description: flaskBlog is a blog application built with Flask. Improper sanitization of the postContent parameter when submitting POST requests to the /createpost API endpoint leads to arbitrary JavaScript execution (XSS) on multiple pages, including /, /post/[ID], /admin/posts, and /user/[ID] of the user that made the post.

Recommendations: At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2025-53631

GHSA-CJ43-H8QF-7RW7

Affected Products

Flaskblog

References · 6

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/53xxx/CVE-2025-53631.json · Exploit
• https://github.com/DogukanUrker/flaskBlog/security/advisories/GHSA-cj43-h8qf-7rw7 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2025-53631 · Security Note
• https://osv.dev/vulnerability/CVE-2025-53631 · Vendor Advisory
• https://t.me/cveNotify/133121 · Telegram Post
• https://twitter.com/CVEnew/status/1956021890352361857 · Twitter Post