PT-2025-48562 · Grav · Grav

Published 2025-12-01 · Updated 2025-12-02 · CVE-2025-66303

Positive Technologies (AI Summary)

CVSS v3.1

4.9

Medium

Base vector

AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions Grav versions prior to 1.8.0-beta.27

Description Grav is susceptible to a Denial of Service (DoS) condition due to improper input sanitization of the scheduled at parameter when processing cron expressions. Manipulating this parameter with malicious input, such as a single quote, can render the application’s admin panel non-functional, disrupting administrative operations. Recovery requires manual intervention on the host server to correct the corrupted cron expression within the backup.yaml file.

Recommendations Update to version 1.8.0-beta.27 or later.

Exploit

Fix

DoS

Resource Exhaustion

Weakness Enumeration

CWE-400

Related Identifiers

CVE-2025-66303

GHSA-X62Q-P736-3997

Affected Products

Grav

References · 8

• 🔥 https://github.com/getgrav/grav/security/advisories/GHSA-x62q-p736-3997 · Exploit
• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/66xxx/CVE-2025-66303.json · Exploit
• https://github.com/getgrav/grav/commit/9d11094e4133f059688fad1e00dbe96fb6e3ead7 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2025-66303 · Security Note
• https://osv.dev/vulnerability/CVE-2025-66303 · Vendor Advisory
• https://twitter.com/VulmonFeeds/status/1995686423408640502 · Twitter Post
• https://t.me/CVEtracker/38594 · Telegram Post
• https://twitter.com/CVEnew/status/1995611524694446334 · Twitter Post