Plattform
wordpress
Komponente
webstack
Behoben in
1.2024.1
1.2024.1
CVE-2026-1555 represents an arbitrary file access vulnerability discovered within the WebStack theme for WordPress. This flaw allows unauthenticated attackers to upload files to the server, potentially enabling remote code execution. The vulnerability affects versions of the WebStack theme up to and including 1.2024. As of the publication date, no official patch has been released to address this security issue.
The impact of CVE-2026-1555 is severe. An unauthenticated attacker can upload any file type to the server, bypassing standard WordPress security measures. This includes executable files like PHP scripts, which could be used to gain remote code execution (RCE). Successful exploitation could lead to complete control of the web server, data theft, website defacement, and further compromise of the underlying infrastructure. The blast radius extends to the entire server and any connected systems. This vulnerability shares similarities with other file upload vulnerabilities that have led to widespread website compromises.
CVE-2026-1555 was published on 2026-04-14 and carries a CRITICAL CVSS score of 9.8. The vulnerability is likely to be actively targeted due to its ease of exploitation and high impact. Public Proof-of-Concept (PoC) code is expected to emerge quickly. Monitor KEV and EPSS for updates on exploitation activity. CISA and NVD advisories are anticipated.
Exploit-Status
EPSS
0.15% (35% Perzentil)
CISA SSVC
CVSS-Vektor
The immediate and essential mitigation for CVE-2026-1555 is to upgrade the WebStack WordPress theme to a patched version. If upgrading is not immediately feasible, implement strict file type validation on the server-side, even if the WordPress plugin claims to do so. Restrict file upload permissions to the WordPress user account. Implement a Web Application Firewall (WAF) with rules to block suspicious file uploads. Regularly scan the server for unauthorized files. After upgrading, confirm the fix by attempting to upload a non-image file (e.g., a .php file) through the upload functionality; it should be rejected.
Kein bekannter Patch verfügbar. Bitte überprüfen Sie die Details der Schwachstelle eingehend und setzen Sie Schutzmaßnahmen basierend auf der Risikobereitschaft Ihrer Organisation um. Es kann am besten sein, die betroffene Software zu deinstallieren und eine Alternative zu finden.
Schwachstellenanalysen und kritische Warnungen direkt in deinen Posteingang.
It means an attacker can upload any type of file to the server, not just images, which can lead to the execution of malicious code.
If you are using the WebStack theme in a version prior to 1.2024, your website is vulnerable. Check the theme version in your WordPress admin dashboard.
Implement firewall rules (WAF) to block the upload of dangerous files and monitor server logs for suspicious activity.
Currently, there are no specific tools to detect this vulnerability, but you can use a WordPress vulnerability scanner to look for insecure configurations.
A web shell is a script that allows an attacker to execute commands on the server through a web browser.
Lade deine Abhängigkeitsdatei hoch und erfahre sofort, ob dich diese und andere CVEs treffen.
Lade deine Abhängigkeitsdatei hoch und erfahre sofort, ob dich diese und andere CVEs treffen.