October: Reflected XSS via DataTable Form Widget
Priority LOW 14CWE-79Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- High
- Impact type
- Cross-site scripting
- Confidentiality · integrity · availability
- None · Low · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-79.
Summary
October is a Content Management System (CMS) and web platform. Prior to 3.7.16 and 4.1.16, a reflected Cross-Site Scripting (XSS) vulnerability was identified in the backend DataTable widget where a query parameter was rendered without proper output escaping. This vulnerability is fixed in 3.7.16 and 4.1.16.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00144 3rd percentileScored 2026-11-07
Fix Fixed october (octobercms): 4.1.16, 3.7.16october/system (Packagist): 3.7.16
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- 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 |
|---|---|---|---|---|---|
| October CMS | october | 4.0.0 to before 4.1.16; before 3.7.16 | 4.1.16, 3.7.16 | Patch available | CNA |
| — | october/system (Packagist) | before 3.7.16 | 3.7.16 | Patch available | GHSA-jj38-h5w5-mvpf |
| — | october/system (Packagist) | 4.0.0 and later | — | No fix listed | GHSA-jj38-h5w5-mvpf |
- october VendorOctober CMS Affected 4.0.0 to before 4.1.16; before 3.7.16 Fixed in 4.1.16, 3.7.16 Patch available CNA
- october/system (Packagist) Vendor— Affected before 3.7.16 Fixed in 3.7.16 Patch available GHSA-jj38-h5w5-mvpf
- october/system (Packagist) Vendor— Affected 4.0.0 and later Fixed in — No fix listed GHSA-jj38-h5w5-mvpf
CPE names Threatist (inferred) · 1
Inferred from how NVD named this product before; not given by a source.
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:octobercms:october:*:*:*:*:*:*:*:* | — | — | October CMS |
- cpe:2.3:a:octobercms:october:*:*:*:*:*:*:*:* Versions — — ·October CMS
Remediation
- Fix · CNA october (octobercms) Fixed in 4.1.16, 3.7.16
- Fix · GHSA-jj38-h5w5-mvpf october/system (Packagist) Fixed in 3.7.16 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2026-27937
- 2026-10-03 Alias added: GHSA-jj38-h5w5-mvpf
References
More October CMS vulnerabilities
- TI-2021-12316 Account Takeover in Octobercms KEVCVSS 3.1CRITICAL 9.1
- TI-2021-12318 Arbitrary code execution in october/system CVSS 3.1HIGH 8.8
- TI-2017-14456 October CMS build 412 is vulnerable to PHP code execution in the file upload… CVSS 3.0HIGH 7.2
- TI-2023-23545 A Cross-Site Scripting (XSS) vulnerability in installation of October v.3.4.16 allows an… CVSS 3.1MEDIUM 5.4
- TI-2023-19223 An arbitrary file upload vulnerability in October CMS v3.4.4 allows attackers to execute… CVSS 3.1MEDIUM 5.4
- TI-2024-30847 October 3.6.30 allows an authenticated admin account to upload a PDF file containing… CVSS 3.1MEDIUM 4.7
Sources
- CVE-2026-27937 · CVE Program
- CVE-2026-27937 · NVD
- FIRST EPSS
- GHSA-jj38-h5w5-mvpf · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences