CVE-2026-24855Public exploitNetwork attack vector

Account takeover via unsanitized event descriptions

Published Jan 30, 2026 · Updated Jan 30, 2026

Stored XSS in ChurchCRM 7.0.5 and earlier allows remote authenticated users to hijack accounts through a crafted event description. The calendar events API writes the Desc field to the event model without server-side sanitization, so stored markup executes when another user opens the event. A low-privilege account with event-creation rights and a viewing victim are required; an administrator victim exposes an administrator session.

CVSS severity9.0
Critical
EPSS probability0.21%
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 ChurchCRM 7.0.5 and earlier allows remote authenticated users to hijack accounts through a crafted event description. The calendar events API writes the Desc field to the event model without server-side sanitization, so stored markup executes when another user opens the event. A low-privilege account with event-creation rights and a viewing victim are required; an administrator victim exposes an administrator session.

The record

CVE
CVE-2026-24855
Published
Jan 30, 2026
Updated
Jan 30, 2026
Vendor
ChurchCRM
Product
ChurchCRM
Classifications
CWE-79, T1539
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jan 30, 2026CVE publishedPublication date reported by the CVE source.
  2. Jan 30, 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=< 6.7.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

ChurchCRM · ChurchCRMversion=< 6.7.2

Published CVSS scores

7.2GitHub CNACVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:H/VA:N/SC:H/SI:H/SA:H/E:P
9.0GitHubCVSS: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.

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 exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1539Steal Web Session Cookie

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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