CVE-2026-47266: CWE-639: Authorization Bypass Through User-Controlled Key in verbb formie
CVE-2026-47266 is a high-severity authorization bypass vulnerability in the verbb Formie plugin for Craft CMS. Before versions 2.2.21 and 3.1.26, unauthenticated users could modify existing form submissions by submitting a known or guessed submission ID to the endpoint formie/submissions/save-submission. This allows unauthorized modification of form data. The issue is fixed in versions 2.2.21 and 3.
AI Analysis
Technical Summary
The vulnerability CVE-2026-47266 affects the Formie plugin for Craft CMS, specifically versions prior to 2.2.21 and between 3.0.0-beta.1 and before 3.1.26. It is classified as CWE-639 (Authorization Bypass Through User-Controlled Key). The flaw allows unauthenticated attackers to modify existing form submissions by posting a known or guessed submission ID to the save-submission endpoint, bypassing authorization controls. This could lead to unauthorized data modification. The vulnerability has a CVSS 4.0 score of 8.7, indicating high severity. The vendor has fixed this issue in versions 2.2.21 and 3.1.26.
Potential Impact
An attacker without authentication can modify existing form submissions by exploiting the authorization bypass. This could compromise the integrity of form data collected via the Formie plugin. There are no known exploits in the wild at this time.
Mitigation Recommendations
Upgrade the Formie plugin to version 2.2.21 or later, or 3.1.26 or later, where this vulnerability is fixed. Since the vendor has released fixed versions, applying these official updates is the recommended remediation. No other mitigation or temporary workaround is indicated.
CVE-2026-47266: CWE-639: Authorization Bypass Through User-Controlled Key in verbb formie
Description
CVE-2026-47266 is a high-severity authorization bypass vulnerability in the verbb Formie plugin for Craft CMS. Before versions 2.2.21 and 3.1.26, unauthenticated users could modify existing form submissions by submitting a known or guessed submission ID to the endpoint formie/submissions/save-submission. This allows unauthorized modification of form data. The issue is fixed in versions 2.2.21 and 3.
CVSS v4.0
Score 8.7high
Affected software
Run on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability CVE-2026-47266 affects the Formie plugin for Craft CMS, specifically versions prior to 2.2.21 and between 3.0.0-beta.1 and before 3.1.26. It is classified as CWE-639 (Authorization Bypass Through User-Controlled Key). The flaw allows unauthenticated attackers to modify existing form submissions by posting a known or guessed submission ID to the save-submission endpoint, bypassing authorization controls. This could lead to unauthorized data modification. The vulnerability has a CVSS 4.0 score of 8.7, indicating high severity. The vendor has fixed this issue in versions 2.2.21 and 3.1.26.
Potential Impact
An attacker without authentication can modify existing form submissions by exploiting the authorization bypass. This could compromise the integrity of form data collected via the Formie plugin. There are no known exploits in the wild at this time.
Mitigation Recommendations
Upgrade the Formie plugin to version 2.2.21 or later, or 3.1.26 or later, where this vulnerability is fixed. Since the vendor has released fixed versions, applying these official updates is the recommended remediation. No other mitigation or temporary workaround is indicated.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-05-18T23:03:37.229Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a19e68ee29bf47b50037d74
Added to database: 05/29/2026, 19:18:38 UTC
Last enriched: 06/05/2026, 21:19:09 UTC
Last updated: 07/31/2026, 19:22:59 UTC
Views: 71
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.