CVE-2026-27937

lowpriority · track · 0EPSS 0.002 · 13 %ileEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.23% (13th) EPSS

CVSS 3.1 · low

Is it mine?

4 products

Check your exposure

Who says so?

3 sources

cnnvd · enisa_euvd · osv

EPSS · scored 2026-10-22

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.

cvss

Technical severity, 0–10. One row per scoring source.

3.1

010

base score 0–10 · higher = more severe · hover a vector to decode

v3.13.1lowCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:Nsecondary · ENISA EU

v3.13.1lowCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:Nsecondary · security-advisories@github.comexploitability 1.6 · impact 1.4

v3.13.1lowCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:Nsecondary · OSV

v3.12.9lowCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N/E:Usecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Trackcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-79USCWE-79US

affected products (4)

Products and version ranges known to be affected.

octobercms October≤ < 3.7.16enisa_euvdEU
octobercms October4.0.0, → 4.1.16enisa_euvdEU
Packagist october/system< 3.7.16osvUSpkg:composer/october/system
Packagist october/system≥ 4.0.0osvUSpkg:composer/october/system

advisories (1)

Vendor and ecosystem advisories describing this.

GHSA-jj38-h5w5-mvpfOctober CMS: Reflected XSS via DataTable Form Widget2026-04-21ghsa · osvUS
A reflected Cross-Site Scripting (XSS) vulnerability was identified in the backend DataTable widget where a query parameter was rendered without proper output escaping. ### Impact - Reflected XSS only, no stored/persistent component - The backend URL prefix is customizable and must be known or guessed by the attacker - Requires an authenticated backend user to visit a crafted URL - No direct access is gained without social engineering ### Patches The vulnerability has been patched in v3.7.16 and v4.1.16. The affected parameter is now properly escaped. All users are encouraged to upgrade to the latest patched version. ### Workarounds - Use a non-default backend URL prefix (recommended as standard practice) - Implement a Content Security Policy (CSP) for backend pages

also known as (2)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd osv NVD CVE.org MITRE

published 2026-04-21modified 2026-06-17

references (4)

External citations — patches, advisories, analysis.

scry

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