A cross-site scripting (XSS) vulnerability exists in My-Blog versions 1.0.0 and earlier. This flaw stems from improper handling of data within the /admin/tags/save file, allowing attackers to inject malicious scripts. Successful exploitation could lead to session hijacking or defacement of the blog. The vulnerability has been publicly disclosed and a patch is available in version 1.0.1.
Impact and Attack Scenarios
The XSS vulnerability in My-Blog allows an attacker to inject arbitrary JavaScript code into the application. This code will then be executed in the context of a user's browser when they visit a compromised page. An attacker could leverage this to steal session cookies, redirect users to malicious websites, or deface the blog's content. The impact is particularly severe if the blog is used for sensitive information or has a large user base, as a successful attack could affect many users simultaneously. This type of XSS is often used as a stepping stone for further attacks, such as phishing or malware distribution.
Exploitation Context
This vulnerability has been publicly disclosed, increasing the likelihood of exploitation. While the CVSS score is LOW, the ease of exploitation and potential impact warrant attention. No known active campaigns targeting this specific vulnerability have been reported as of the publication date, but the availability of a public proof-of-concept suggests that exploitation is possible. The vulnerability was published on 2025-08-18.
Threat Intelligence
Exploit Status
EPSS
0.03% (9% percentile)
CISA SSVC
CVSS Vector
What do these metrics mean?
- Attack Vector
- Network — remotely exploitable over the internet. No physical or local access required. Widest attack surface.
- Attack Complexity
- Low — no special conditions required. Attacker can exploit reliably without depending on rare configurations or timing.
- Privileges Required
- Low — any valid user account is sufficient. Basic authenticated access required.
- User Interaction
- Required — victim must take an action: open a file, click a link, or visit a crafted page.
- Scope
- Unchanged — impact is limited to the vulnerable component itself.
- Confidentiality
- None — no confidentiality impact. Attacker cannot read protected data.
- Integrity
- Low — attacker can modify some data with limited scope or impact.
- Availability
- None — no availability impact. Service remains fully operational.
Affected Software
Weakness Classification (CWE)
Timeline
- Reserved
- Published
- EPSS updated
Mitigation and Workarounds
The primary mitigation for CVE-2025-9101 is to upgrade My-Blog to version 1.0.1 or later, which contains the fix. If upgrading is not immediately feasible, consider implementing input validation and output encoding on the /admin/tags/save endpoint to sanitize user-supplied data. Web application firewalls (WAFs) configured to detect and block XSS payloads can also provide a temporary layer of protection. Review and restrict access to the /admin/tags/save endpoint to authorized personnel only.
How to fix
Update My-Blog to a version later than 1.0.0, if available, that fixes the Cross-Site Scripting (XSS) vulnerability. If no updates are available, consider disabling or removing the Tag Handler component. As a temporary measure, you may implement input validation and escaping rules in the /admin/tags/save file to mitigate the risk of malicious code injection.
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Frequently asked questions
What is CVE-2025-9101 — XSS in My-Blog?
CVE-2025-9101 is a cross-site scripting (XSS) vulnerability affecting My-Blog versions 1.0.0 and earlier, allowing attackers to inject malicious scripts via the /admin/tags/save endpoint.
Am I affected by CVE-2025-9101 in My-Blog?
You are affected if you are using My-Blog version 1.0.0 or earlier. Upgrade to version 1.0.1 or later to mitigate the vulnerability.
How do I fix CVE-2025-9101 in My-Blog?
Upgrade My-Blog to version 1.0.1 or later. As a temporary workaround, implement input validation and output encoding on the /admin/tags/save endpoint.
Is CVE-2025-9101 being actively exploited?
While no active campaigns have been confirmed, the vulnerability has been publicly disclosed and a proof-of-concept exists, increasing the risk of exploitation.
Where can I find the official My-Blog advisory for CVE-2025-9101?
Refer to the My-Blog project's official website or repository for the latest security advisories and updates related to CVE-2025-9101.
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