CVE-2026-8898Network attack vector

Stored XSS via unescaped shortcode attributes

Published May 27, 2026 · Updated May 27, 2026

Stored XSS in Events In City 3.0 and earlier allows remote authenticated users to inject scripts through org-events attributes. The org_event_scode() function concatenates organizer_id, width, height, transparency, header, border, and layout values into HTML attributes without esc_attr(). Contributor-level access is required, and the stored payload runs when a user views the injected page, enabling browser-context data access or actions.

CVSS severity6.4
Medium
EPSS probability0.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in Events In City 3.0 and earlier allows remote authenticated users to inject scripts through org-events attributes. The org_event_scode() function concatenates organizer_id, width, height, transparency, header, border, and layout values into HTML attributes without esc_attr(). Contributor-level access is required, and the stored payload runs when a user views the injected page, enabling browser-context data access or actions.

The record

CVE
CVE-2026-8898
Published
May 27, 2026
Updated
May 27, 2026
Vendor
Ruchit Patel
Product
Events In City
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 27, 2026CVE publishedPublication date reported by the CVE source.
  2. May 27, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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

  1. Affected versionversion=0 <=3.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Ruchit Patel · Events In Cityversion=0 <=3.0

Published CVSS scores

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.

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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')
T1059.007JavaScript

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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