Plattform
wordpress
Komponente
ultimate-post
Behoben in
5.0.9
CVE-2026-1273 describes a Server-Side Request Forgery (SSRF) vulnerability discovered in the Post Grid Gutenberg Blocks for News, Magazines, Blog Websites – PostX plugin for WordPress. This vulnerability allows authenticated attackers with administrator-level access to initiate web requests to arbitrary locations, potentially exposing internal services and sensitive data. The vulnerability affects versions 0.0.0 through 5.0.8, and a patch is available in version 5.0.9.
The SSRF vulnerability in PostX allows an authenticated administrator to craft malicious requests through the /ultp/v3/starterdummypost/ and /ultp/v3/starterimportcontent/ REST API endpoints. This enables an attacker to query internal resources that are not directly accessible from the outside world. For example, an attacker could potentially scan internal network ranges, access metadata services, or even interact with other internal applications. The blast radius is limited to the internal network accessible from the WordPress server, but the potential for data exposure and privilege escalation within that network is significant. Successful exploitation could lead to unauthorized access to sensitive data, modification of internal configurations, or even complete compromise of the underlying server.
CVE-2026-1273 was publicly disclosed on 2026-03-04. There is currently no indication of active exploitation in the wild, and no public proof-of-concept (POC) code has been released. The vulnerability has been added to the CISA KEV catalog, indicating a medium probability of exploitation. Monitor WordPress plugin updates and security advisories for further information.
WordPress websites utilizing the Post Grid Gutenberg Blocks for News, Magazines, Blog Websites – PostX plugin, particularly those running versions 0.0.0 through 5.0.8, are at risk. Sites with weak password policies or compromised administrator accounts are especially vulnerable. Shared hosting environments where plugin updates are not consistently managed also face increased risk.
• wordpress / composer / npm:
grep -r 'ultp/v3/starter_dummy_post/' /var/www/html/wp-content/plugins/postx/• generic web:
curl -I https://your-wordpress-site.com/ultp/v3/starter_dummy_post/ | grep HTTP/1.1disclosure
Exploit-Status
EPSS
0.04% (13% Perzentil)
CISA SSVC
CVSS-Vektor
The primary mitigation for CVE-2026-1273 is to immediately upgrade the PostX plugin to version 5.0.9 or later. If upgrading is not immediately feasible due to compatibility issues or breaking changes, consider implementing a Web Application Firewall (WAF) rule to block requests to the /ultp/v3/starterdummypost/ and /ultp/v3/starterimportcontent/ endpoints. Additionally, restrict the plugin’s access to internal resources by implementing network segmentation and access control lists. After upgrading, verify the fix by attempting to access an internal resource through the vulnerable endpoints and confirming that the request is blocked or redirected.
Aktualisieren Sie auf Version 5.0.9 oder eine neuere gepatchte Version
Schwachstellenanalysen und kritische Warnungen direkt in deinen Posteingang.
CVE-2026-1273 is a Server-Side Request Forgery vulnerability affecting the PostX WordPress plugin, allowing authenticated administrators to make arbitrary web requests.
You are affected if you are using PostX versions 0.0.0 through 5.0.8 and have administrator access.
Upgrade the PostX plugin to version 5.0.9 or later. Consider WAF rules as a temporary workaround if immediate upgrade is not possible.
There is currently no evidence of active exploitation, but the SSRF nature of the vulnerability presents a potential risk.
Refer to the PostX plugin documentation and WordPress security announcements for the official advisory.
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.