CVE-2026-42611 json
Grav: Stored XSS via Tag Injection
published 2026-05-05 6 mo ago modified 2026-10-26 13 d ago also EUVD-2026-29069 , GHSA-w8cg-7jcj-4vv2
- cvss
- 8.9
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 22%
- public exploits
- 0
- none known
Summary
Grav is a file-based Web platform. Prior to 2.0.0-beta.2, a low-privileged (with the ability to create a page) user can cause XSS with the injection of svg element. The XSS can further be escalated to dump the entire system information available under /admin/config/info whenever a Super Admin visits the page; which can further be chained with the use of admin-nonce to do a complete server compromise (RCE). This vulnerability is fixed in 2.0.0-beta.2.
Patch / fix
- packagist getgrav/grav 2.0.0-beta.2
- getgrav grav 2.0.0-beta.2
- getgrav grav_cms 2.0.0-beta.2
CISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- no
- Technical impact
- partial
- Assessed
- 5 mo ago
Exploit prediction
0.30% chance of exploitation in the next 30 days, higher than 22% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- github.com https://github.com/getgrav/grav/security/advisories/GHSA-w8cg-7jcj-4vv2 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 8.9 | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:H |
| GitHub | 3.1 | 8.9 | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:H |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| packagist | getgrav/grav | <2.0.0-beta.2 |
2.0.0-beta.2 |
Affected products
- getgrav grav
Classification
- Weakness
-
- CWE-79 Improper Neutralization of Input During Web Page Generation
References
-
github.com
/getgrav/grav/commit/5a12f9be8314682c8713e569e330f11805d0a663
web, patch
-
github.com
/getgrav/grav/security/advisories/GHSA-w8cg-7jcj-4vv2
exploit, web, patch, vendor-advisory
-
nvd.nist.gov
/vuln/detail/CVE-2026-42611
advisory
-
github.com
/getgrav/grav
package
Sources
- CVE List CVE-2026-42611
- GitHub Advisory GHSA-w8cg-7jcj-4vv2
- NVD CVE-2026-42611
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.
CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.