CVE-2026-85598CWE-79cross-site-scripting

CVE-2026-85598

Medium · published September 4, 2026

CVSS v3.1
6.4
EPSS
0%
Percentile
16.4
In the wild
Unconfirmed
What it is

Grav versions 2.0.0 through 2.0.17 fail to apply save-time XSS detection to modular pages, allowing authenticated page editors to store Twig-assembled XSS payloads. Attackers with page-edit rights can create modular pages with malicious Twig code that executes in visitor browsers when the parent page is rendered, including in administrator sessions.

The record
Technical detail
CVSS v3.1
6.4 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
CVSS v4.0
5.1 · CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
EPSS
0.00256 · 16.4th percentile
Weakness
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Published
2026-09-04T16:17Z
References (2)
https://github.com/getgrav/grav/security/advisories/GHSA-fg8g-663r-f366 · [email protected]https://www.vulncheck.com/advisories/grav-2.0.0-through-2.0.17-stored-xss-via-modular-pages · [email protected]
EPSS history
Timeline
  • 06 SEP 03:33Z
    EPSS moved — → 0%
    epss
  • 04 SEP 11:30Z
    Grav 2.0.0 through 2.0.17 Stored XSS via Modular Pages
    cvelistv5