Vulnerability · CVE-2026-42845
The form plugin for Grav adds the ability to create and use forms.
Published May 11, 2026 · catalog updated Jun 17, 2026 · The form plugin for
Check if you run it
No confirmed exploitation is on record for CVE-2026-42845. EPSS is 0.45%. Act only if a listed version of The form plugin for is installed.
Gaps on this record
- The stored product name is a package slug. The name on this page is taken from the title (The form plugin for).
- No version range is stored. A customer cannot check an installed version against this record.
- No vendor fix or required action is stored. Compare the linked advisory before you change production.
- Severity
- High7.7
- Known exploitation
- Not in CISA/VulnCheck KEV
- EPSS
- 0.45%
- Remediation
- Advisory link
- Affected products
- See sources for product scope
The form plugin for Grav adds the ability to create and use forms. Prior to 9.1.0 , there is an unauthenticated page-content overwrite via file upload (GHSA-w4rc-p66m-x6qq). Public form uploads now strip path components from the POST-supplied filename and hard-block page-content extensions ( , , , , , ) regardless of the configurable dangerous-extensions list. A permissive policy combined with the default could otherwise let an attacker overwrite the page's own and pivot to super-admin via a action. This vulnerability is fixed in 9.1.0.
No affected version ranges are stored yet. Use the vendor advisory before you decide this record does not apply.
How to fix CVE-2026-42845
Recommended remediation
A patch or advisory reference is linked. Open the original publisher for availability by product version.
Official advisories
What to do
Three questions, each answered from this record only. Confirm the vendor advisory before you patch.
Should you patch?
No confirmed exploitation is on record for CVE-2026-42845. EPSS is 0.45%. Act only if a listed version of The form plugin for is installed.
Which versions are affected?
Affected version ranges are not on this record. Compare the installed version with the linked vendor advisory before you change production.
What should an analyst verify?
CWE-73. EPSS 0.45%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.
Code
The project this record applies to. Exploit listings stay in References.
Timeline
Detection, updates, and resolution for this record.
May 11, 2026 · NIST NVD
Detected
The form plugin for Grav adds the ability to create and use forms. Prior to 9.1.0 , there is an unauthenticated page-content overwrite via file upload (GHSA-w4rc-p66m-x6qq). Public form uploads now strip path components from the POST-supplied filename and hard-block page-content extensions ( , , , , , ) regardless of the configurable dangerous-extensions list. A permissive policy combined with the
Jun 17, 2026 · NIST NVD
Updated
The form plugin for Grav adds the ability to create and use forms. Prior to 9.1.0 , there is an unauthenticated page-content overwrite via file upload (GHSA-w4rc-p66m-x6qq). Public form uploads now strip path components from the POST-supplied filename and hard-block page-content extensions ( , , , , , ) regardless of the configurable dangerous-extensions list. A permissive policy combined with the
Sources
- CVE.orgVulnerability recordCVE-2026-42845
Official CVE identifier
cve.org - FIRST EPSSExploitation probabilityCVE-2026-42845
30-day exploitation probability 0.4%
first.org - NIST NVDVulnerability recordCVE-2026-42845
The form plugin for Grav adds the ability to create and use forms. Prior to 9.1.0 , there is an unauthenticated page-content overwrite via file upload (GHSA-w4rc-p66m-x6qq). Public form uploads now strip path components from the POST-supplied filename and hard-block page-content
nvd.nist.gov
References
Freshness
Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.