CVE-2025-55735
MEDIUM EPSS 9.1%
Published Aug 19, 202510mo ago · Modified Jun 17, 20262w ago
5.3 CVSS 4.0
Published Aug 19, 2025 10mo ago
Last Modified Jun 17, 2026 2w ago
Description
flaskBlog is a blog app built with Flask. In 2.8.0 and earlier, when creating a post, there's no validation of the content of the post stored in the variable "postContent". The vulnerability arises when displaying the content of the post using the | safe filter, that tells the engine to not escape the rendered content. This can lead to a stored XSS inside the content of the post. The code that causes the problem is in template/routes.html.
CVSS Details
Base Score
Exploitability
Impact
Vector string
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction P
Scope X
Threat Intelligence
EPSS Exploit Probability
9.1% percentile
Exploit & Patch Status
Public Exploit Known
No Patch Available
Weaknesses 2
CWE-79 Cross-site Scripting Injection
CWE-807
Affected Products 1
| Vendor | Product | Version | Range |
|---|---|---|---|
| dogukanurker | flaskblog | * | ≤2.8.0 |
References 1
- github.com https://github.com/DogukanUrker/FlaskBlog/security/advisories/GHSA-gj9v-qhc3-gcfx
Remediation
No remediation data recorded yet
Check vendor advisories and the NVD entry for patch availability.