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CVE-2025-5406: Unrestricted Upload in chaitak-gorai Blogbook

Medium
VulnerabilityCVE-2025-5406cvecve-2025-5406
Published: Sun Jun 01 2025 (06/01/2025, 18:31:04 UTC)
Source: CVE Database V5
Vendor/Project: chaitak-gorai
Product: Blogbook

Description

A vulnerability, which was classified as critical, was found in chaitak-gorai Blogbook up to 92f5cf90f8a7e6566b576fe0952e14e1c6736513. Affected is an unknown function of the file /admin/posts.php?source=add_post. The manipulation of the argument image leads to unrestricted upload. It is possible to launch the attack remotely. The exploit has been disclosed to the public and may be used. Continious delivery with rolling releases is used by this product. Therefore, no version details of affected nor updated releases are available. The vendor was contacted early about this disclosure but did not respond in any way.

AI-Powered Analysis

AILast updated: 07/09/2025, 12:58:25 UTC

Technical Analysis

CVE-2025-5406 is a critical vulnerability identified in the chaitak-gorai Blogbook software, specifically affecting the /admin/posts.php?source=add_post endpoint. The vulnerability arises from improper handling of the 'image' argument, which allows an attacker to perform unrestricted file uploads. This means that an attacker can remotely upload arbitrary files, potentially including malicious scripts or executables, without authentication or user interaction. The vulnerability exists in the version identified by commit hash 92f5cf90f8a7e6566b576fe0952e14e1c6736513, but due to the product's continuous delivery model with rolling releases, exact affected or patched versions are not clearly delineated. The vendor has not responded to disclosure attempts, and no official patches or updates have been made publicly available. The CVSS 4.0 base score is 5.3 (medium severity), reflecting network attack vector, low attack complexity, no privileges or user interaction required, but limited impact on confidentiality, integrity, and availability. However, the unrestricted upload capability can be leveraged for a range of attacks, including remote code execution, web shell deployment, or defacement, depending on server configuration and file validation mechanisms. The lack of authentication requirement and remote exploitability increase the risk profile. The vulnerability is publicly disclosed, but no known exploits in the wild have been reported yet. Given the critical nature of unrestricted file upload vulnerabilities, this issue poses a significant threat to systems running vulnerable versions of Blogbook, especially those exposing the admin interface to the internet.

Potential Impact

For European organizations using chaitak-gorai Blogbook, this vulnerability could lead to severe security breaches. Attackers exploiting the unrestricted upload could gain unauthorized access to internal systems, execute arbitrary code, or deploy persistent web shells, leading to data theft, service disruption, or further lateral movement within networks. The impact on confidentiality is moderate due to potential data exposure; integrity can be compromised by unauthorized content modification; availability may be affected if attackers deploy ransomware or disrupt services. Organizations in sectors with high regulatory requirements, such as finance, healthcare, or government, face increased risks of compliance violations and reputational damage. The continuous delivery model without clear patch versions complicates timely remediation, increasing exposure duration. Additionally, the vendor's lack of response hinders coordinated vulnerability management. European entities with public-facing Blogbook admin panels are particularly vulnerable to remote exploitation, which could result in widespread compromise if not addressed promptly.

Mitigation Recommendations

1. Immediate mitigation should include restricting access to the /admin/posts.php endpoint via network controls such as IP whitelisting, VPN-only access, or web application firewalls (WAF) with strict rules to block unauthorized upload attempts. 2. Implement strict server-side validation and sanitization of uploaded files, including checking MIME types, file extensions, and scanning for malicious content, even if the application does not currently do so. 3. Disable or restrict file execution permissions in upload directories to prevent execution of uploaded malicious scripts. 4. Monitor web server logs and application logs for unusual upload activity or access patterns indicative of exploitation attempts. 5. If possible, temporarily disable the image upload feature until a secure patch or update is available. 6. Engage in active threat hunting and deploy intrusion detection/prevention systems (IDS/IPS) tuned to detect exploitation attempts targeting this vulnerability. 7. Maintain regular backups of critical data and configurations to enable recovery in case of compromise. 8. Advocate for vendor engagement and monitor for any forthcoming patches or updates, applying them promptly once available. 9. Consider alternative blogging platforms with better security track records if remediation is not feasible in the short term.

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Technical Details

Data Version
5.1
Assigner Short Name
VulDB
Date Reserved
2025-05-31T16:13:30.418Z
Cvss Version
4.0
State
PUBLISHED

Threat ID: 683c9f34182aa0cae21f5020

Added to database: 6/1/2025, 6:43:00 PM

Last enriched: 7/9/2025, 12:58:25 PM

Last updated: 8/12/2025, 1:05:03 PM

Views: 16

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