GenerateBlocks WordPress plugin: Stored cross-site scripting (XSS)
Summary
The GenerateBlocks WordPress plugin up to and including version 2.5.0 contains a stored cross-site scripting (XSS) vulnerability (CWE-79). An attacker with a Contributor-level account can store malicious scripts that run in the browser of anyone who views the affected content, including administrators. Exploitation requires a privileged user to perform an action, such as clicking a malicious link or visiting a crafted page.
Affected
- GenerateBlocks WordPress plugin up to and including 2.5.0
- The earliest affected version is not stated (CNA lists "n/a"). Unknown whether older releases are affected.
Fixed in
- Version 2.5.1 (per Patchstack and the GeneratePress 2.5.1 changelog)
- The link between this CVE and the 2.5.1 changelog is inferred; the changelog does not mention the CVE.
Workaround
- No vendor workaround documented.
- Until the update is applied: review accounts with Contributor or higher rights and limit self-registration.
Exploitation
- Not listed in CISA KEV as of 11 Nov 2026.
- No reports of exploitation found.
- No public exploit code indexed in Metasploit or Exploit-DB; no public Nuclei template.
- The record is new (published 11 Nov 2026), so the status may change.
Our recommendation
- Inventory all WordPress sites using GenerateBlocks, including GenerateBlocks Pro, and record their versions.
- Update to version 2.5.1 or later.
- Review Contributor-level and higher accounts, and disable open registration where it is not needed.
- Monitor the NVD and CISA KEV status for changes.
Public exploits
PoC-in-GitHub, Metasploit and Exploit-DB list nothing for this CVE.
Research sources
- Patchstack vulnerability advisory patchstack.com
- GeneratePress GenerateBlocks 2.5.1 changelog generatepress.com
- WordPress.org GenerateBlocks plugin page wordpress.org
- Patchstack GenerateBlocks vulnerability history patchstack.com
- Strix CVE-2026-121773 details www.strix.ai
- OffSeq radar CVE-2026-121773 radar.offseq.com
Researched and written up in English and German by an AI (Claude by Anthropic) based on NVD, CISA, EPSS and the sources listed. The vendor information is authoritative. Researched on 11 Nov 2026, 13:43.
Original description (NVD)
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in GeneratePress GenerateBlocks generateblocks allows Stored XSS.This issue affects GenerateBlocks: from n/a through 2.5.0.
Sources
The tracker combines official, freely usable data sources – updated continuously:
- NVD (NIST) – CVEs, rating (CVSS), affected products
- CISA KEV – vulnerabilities confirmed by CISA as actively exploited
- CISA Vulnrichment – CISA assessment (SSVC) in the official CVE record
- FIRST EPSS – probability of exploitation
- Microsoft MSRC – Patch Tuesday: vulnerabilities, severity, updates
- PoC-in-GitHub – public proof-of-concept repositories
- Metasploit (Rapid7) – modules of the Metasploit Framework
- Exploit-DB (OffSec) – archive of public exploits (links only)
- Patch days: official vendor pages (linked per vendor) (Vendor patch days)
This product uses data from the NVD API but is not endorsed or certified by the NVD. EPSS data © FIRST.org.
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