CVE-2026-31918Network attack vector

Contributor-level browser script execution via unescaped page content

Published Mar 13, 2026 · Updated Mar 13, 2026

Stored cross-site scripting in immonex Kickstart 1.13.0 and earlier allows remote authenticated users to inject scripts into pages. Public records do not identify the affected field, shortcode, template, or rendering function; they disclose only insufficient input sanitization and output escaping. Contributor-level access is required, and the script runs in another user's browser when that user opens an injected page.

CVSS severity6.5
Medium
EPSS probability0.16%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored cross-site scripting in immonex Kickstart 1.13.0 and earlier allows remote authenticated users to inject scripts into pages. Public records do not identify the affected field, shortcode, template, or rendering function; they disclose only insufficient input sanitization and output escaping. Contributor-level access is required, and the script runs in another user's browser when that user opens an injected page.

The record

CVE
CVE-2026-31918
Published
Mar 13, 2026
Updated
Mar 13, 2026
Vendor
immonex
Product
immonex Kickstart
Classifications
CWE-79, T1189
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 13, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 13, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=n/a <=<= 1.13.0 changes=[{"at":"1.13.4","status":"unaffected"}]

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

immonex · immonex Kickstartversion=n/a <=<= 1.13.0 changes=[{"at":"1.13.4","status":"unaffected"}]

Published CVSS scores

6.5CISA-ADPCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L
5.0Rapid7AV:N/AC:L/Au:S/C:P/I:P/A:N
6.5PatchstackCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L
6.4WordfenceCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1189Drive-by Compromise

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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