CVE-2026-45014Network attack vector

Stored XSS via unescaped user display name

Published Jun 12, 2026 · Updated Jun 12, 2026

Stored XSS in ApostropheCMS 4.29.0 and earlier allows remote attackers to execute script in other users' browsers via a crafted full name. The admin bar's draft-version page-title tooltip renders the stored user display name as HTML without sanitizing or escaping it. A victim must view the affected tooltip in a multi-user project's administrative interface, where the script runs with that victim's browser privileges.

CVSS severity5.3
Medium
EPSS probability0.29%
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 ApostropheCMS 4.29.0 and earlier allows remote attackers to execute script in other users' browsers via a crafted full name. The admin bar's draft-version page-title tooltip renders the stored user display name as HTML without sanitizing or escaping it. A victim must view the affected tooltip in a multi-user project's administrative interface, where the script runs with that victim's browser privileges.

The record

CVE
CVE-2026-45014
Published
Jun 12, 2026
Updated
Jun 12, 2026
Vendor
Apostrophe Technologies
Product
ApostropheCMS
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 12, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 12, 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=<= 4.29.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Apostrophe Technologies · ApostropheCMSversion=<= 4.29.0

Published CVSS scores

5.3GitHub, Inc.CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA: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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1059.007JavaScript/JScript

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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