TI-2026-51058 Aliases CVE-2026-72832 GHSA-269c-h76q-8cxw

Grav before 2.0.13 Stored XSS via quoted-attribute bypass

MEDIUM 56CWE-79Published 2026-08-14 · Updated 2026-10-29

Key facts

Attack vector: Network
Privileges required: Low
User interaction: Passive
Attack complexity: Low
Attack requirements: None
Impact type: Cross-site scripting
Confidentiality · integrity · availability: Low · Low · None
Fix status: Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub. Impact type from CWE-79.

Summary

Grav versions from 1.5.2 through 2.0.12 contain a stored cross-site scripting vulnerability in the Security::detectXss() function (system/src/Grav/Common/Security.php). The event-handler scan is anchored at `<` and uses `[^>]*?`, which cannot cross the first literal `>`; when a `>` appears inside a quoted attribute value the browser keeps the tag open and parses a subsequent event handler (e.g. onerror), so the detector and browser disagree. A page editor without admin.super privileges can save page content such as `<img src=x title=">" onerror=alert(document.domain)>`, which is accepted, stored, and executed in the site origin when any visitor (including unauthenticated users) views the page. Fixed in 2.0.13.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV

EPSS 0.00314 24th percentileScored 2026-11-07

Fix Fixed getgrav/grav (Packagist): 2.0.13

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: Poc
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
getgrav	grav	1.5.2 – 2.0.12	—	No fix listed	CNA
—	getgrav/grav (Packagist)	1.5.2 to before 2.0.13	2.0.13	Patch available	GHSA-269c-h76q-8cxw

grav Vendorgetgrav Affected 1.5.2 – 2.0.12 Fixed in — No fix listed CNA
getgrav/grav (Packagist) Vendor— Affected 1.5.2 to before 2.0.13 Fixed in 2.0.13 Patch available GHSA-269c-h76q-8cxw

Remediation

Fix · GHSA-269c-h76q-8cxw getgrav/grav (Packagist) Fixed in 2.0.13 Advisory →

Timeline

2026-10-02 Threatist record created from CVE-2026-72832
2026-10-03 Alias added: GHSA-269c-h76q-8cxw
2026-10-29 Title updated · CNA

References

Patch 1

Patch Commit

Advisory 2

Other 1

https://github.com/getgrav/grav

TI-2026-30893 Grav: Privilege Escalation via Missing Server-Side Validation of groups/access CVSS 3.1CRITICAL 9.4
TI-2025-28971 Cross Site Scripting vulnerability in grav v.1.7.48 and before allows an attacker to… CVSS 3.1CRITICAL 9.8
TI-2021-04523 Unauthenticated Arbitrary YAML Write/Update leads to Code Execution CVSS 3.1CRITICAL 9.8
TI-2026-50940 Grav CMS before 2.0.16 Origin Validation Bypass via Referer CVSS 4.0CRITICAL 9.3
TI-2026-46446 Grav before 2.0.7 Remote Code Execution via Blueprint dynamicData CVSS 4.0CRITICAL 9.3
TI-2021-22428 GravCMS 1.10.7 - Arbitrary YAML Write/Update (Unauthenticated) (2) CVSS 4.0CRITICAL 9.3

See all 228 →

Sources

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