Vulnerability record
CVE-2026-124018
The short answer
CVE-2026-124018 affects Jegstudio Gutenverse Form – Contact Form Builder, Block Form & Booking Form and is rated medium (CVSS 5.3). It is not in CISA's Known Exploited Vulnerabilities catalog.
What it is
Gutenverse Form plugin for WordPress before 3.2.2 contains a CSV formula injection vulnerability that allows unauthenticated attackers to inject spreadsheet formula-trigger characters by submitting free-text field values to the public form-submit REST route, which sanitizes input with sanitize_text_field() without stripping characters such as =, +, @, or a leading minus. Attackers can store malicious formulas in entry-data post meta that are later exported unneutralized via fputcsv() or esc_html() in the CSV export functions, causing the formula to execute when an administrator opens the exported file, enabling data exfiltration to an attacker-controlled URL or command execution on the administrator's workstation.
Weakness: CWE-1236.
Severity
5.3 medium
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Exploited (CISA KEV)
Not listed
CISA lists confirmed exploitation only
EPSS, next 30 days
No score
FIRST scores CVEs within a day of publication
How it can be exploited
- Attack vector
- Network
- Attack complexity
- Low
- Attack requirements
- None
- Privileges required
- None
- User interaction
- Passive
- Confidentiality impact
- None
- Integrity impact
- None
- Availability impact
- None
Affected products
Gutenverse Form – Contact Form Builder, Block Form & Booking Form. NVD's record lists the exact affected versions.
References
Questions
Is CVE-2026-124018 being exploited?
It is not in CISA's Known Exploited Vulnerabilities catalog as of 2026-11-12.
How do I fix CVE-2026-124018?
Follow the vendor advisory in the references below. NVD lists the affected versions under its configurations.
From NVD, CISA KEV, FIRST EPSS and OSV.dev, checked . Status on NVD: Received. The description is NVD's text, quoted as published.
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