iChart WordPress plugin: Missing authorization checks in AJAX actions
Summary
The iChart WordPress plugin before version 2.2.4 does not check capabilities or ownership in several AJAX actions. It relies only on a nonce that any logged-in user can obtain. A user with a low role such as Subscriber can read, modify and permanently delete arbitrary posts and overwrite a site-wide option. The attacker needs a valid user account on the site, so the risk is highest where open registration or customer accounts exist.
Affected
- iChart WordPress plugin, all versions before 2.2.4 (VulDB lists up to 2.2.3)
Fixed in
- Version 2.2.4 (according to the WPScan and OffSeq data; verify against the plugin changelog on wordpress.org)
Workaround
- Unknown. A patch is available, so upgrading is the recommended fix.
- If the plugin is not needed, deactivate and delete it.
Exploitation
- No exploitation in the wild is known. The issue is not in the CISA KEV catalog.
- No public exploit code is known as of 10 November 2026.
- CISA SSVC: exploitation none, automatable no, technical impact total.
Our recommendation
- Update the iChart plugin to version 2.2.4 or later, within the normal update cycle, and sooner on sites with open registration.
- Until patched, review subscriber-level accounts and disable open user registration if it is not required.
- Check for unexpected post changes or deletions and for changes to site options.
- Remove unused plugins.
Public exploits
PoC-in-GitHub, Metasploit and Exploit-DB list nothing for this CVE.
Research sources
- WPScan vulnerability entry wpscan.com
- VulDB CVE-2026-121998 vuldb.com
- VulDB vulnerability 435662 vuldb.com
- OffSeq radar: iChart before 2.2.4 radar.offseq.com
- OpenCVE CVE-2026-121998 app.opencve.io
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, 13:25.
Original description (NVD)
The iChart WordPress plugin before 2.2.4 does not perform capability or ownership checks in several of its AJAX actions, relying only on a nonce that any logged-in user can obtain, allowing users with a role as low as Subscriber to read, modify and permanently delete arbitrary posts and to overwrite a site-wide option.
NVD references (1)
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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