Medium severity · published Oct 12, 2026
CVE-2026-109319
Grav Guestbook Plugin 0.5.0 and 0.5.1 Missing Authorization and CSRF in Moderation
4.3
CVSS
0.2%
EPSS
No
On KEV
Description
Grav Guestbook plugin 0.5.0 and 0.5.1 contains missing authorization and cross-site request forgery vulnerabilities in Admin moderation actions delete, approve, and approveAll. Authenticated Admin users lacking the admin.guestbook permission, or external sites abusing a moderator's session via nonce-less GET requests, can delete or approve Guestbook entries.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
Low
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 10% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
GR
grav-plugin-guestbook · getgrav
0.5.0 before 0.5.2 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-109319
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-109319
vendor-advisory
https://github.com/getgrav/grav/security/advisories/GHSA-wxr7-h5mm-c7mv
third-party-advisory
https://www.vulncheck.com/advisories/grav-guestbook-plugin-0.5.0-and-0.5.1-missing-authorization-and-csrf-in-moderation
More from grav-plugin-guestbook
6.1
CVE-2026-109322
Grav Guestbook before 0.5.2 Stored XSS via AJAX Pagination and Admin Views