CVE-2026-55562Public exploitNetwork attack vectorHinoki check available

Administrator takeover via unescaped Activity Log names

Published Oct 13, 2026 · Updated Oct 13, 2026

Stored XSS in Cronicle before 0.9.119 allows remote authenticated users to take over administrator accounts via crafted account names. The Activity.js renderer concatenates item.user.full_name into HTML passed to this.div.html without encoding; newline-containing tags bypass the bundled input filter. Planting requires a session and current password, or anonymous registration with free_accounts enabled; an administrator must open the Activity Log, after which privileged features enable command execution as the service account.

CVSS severity9.0
Critical
EPSS probability0.37%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Stored XSS in Cronicle before 0.9.119 allows remote authenticated users to take over administrator accounts via crafted account names. The Activity.js renderer concatenates item.user.full_name into HTML passed to this.div.html without encoding; newline-containing tags bypass the bundled input filter. Planting requires a session and current password, or anonymous registration with free_accounts enabled; an administrator must open the Activity Log, after which privileged features enable command execution as the service account.

The record

CVE
CVE-2026-55562
Published
Oct 13, 2026
Updated
Oct 13, 2026
Vendor
Joseph Huckaby
Product
Cronicle
Classifications
CWE-79, T1203
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 13, 2026CVE publishedPublication date reported by the CVE source.
  2. Oct 13, 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=< 0.9.119

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Joseph Huckaby · Cronicleversion=< 0.9.119

Published CVSS scores

9.0GitHub CNACVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H

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.

Activity data is delayed. The latest report is Sep 28, 2026.

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

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1203Exploitation for Client Execution

Public exploit references

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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