Cyber Resilience

CVE-2026-35576

XSS in Churchcrm ≤ 7.0.0

XSS
Published
07 April 2026
Modified
09 April 2026
Patch / advisory
View advisory
CVSS Score v3.1 8.7
Click a component to see what it means
Raw vectorCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N
EPSS Score 0.0026 18th percentile
Risk Priority 59 floored blend · peak EPSS

CVSS and EPSS are reproduced from their sources (NVD, FIRST EPSS). Risk Priority is our own derived reading, not an NVD score.

Summary

CVE-2026-35576 is a high-severity Cross-site Scripting (CWE-79) vulnerability in Churchcrm Churchcrm. Its CVSS base score is 8.7 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Browser Session Hijacking (T1185); ranked at the 18th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

The strongest mitigations our analysis identified map to SA-11 (Developer Testing and Evaluation) and SI-10 (Information Input Validation) — see the control section below for these in your framework.

Deeper analysis AI-assisted summary

Synthesised by an AI model from the NVD description and linked references — a reading aid, not an authoritative source.

CVE-2026-35576 is a stored cross-site scripting (XSS) vulnerability, classified under CWE-79, affecting ChurchCRM, an open-source church management system, in versions prior to 7.0.0. The flaw resides in the Person Property Management subsystem, where dynamically assigned person properties fail to sanitize input, allowing injection of arbitrary JavaScript code. This issue persists even in versions previously patched for CVE-2023-38766, earning a CVSS v3.1 base score of 8.7 (AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N).

An authenticated user with low privileges can exploit this vulnerability by injecting a malicious payload into a person property, which is then persistently stored in the database. When other users, including administrators, view the affected person's profile or access its printable view, the payload executes in their browsers, potentially enabling session hijacking, theft of sensitive data, or full account compromise due to the cross-origin scope change.

ChurchCRM addresses this vulnerability in version 7.0.0. Security practitioners should upgrade to this release immediately. Relevant advisories and patch details are available in the GitHub security advisory at https://github.com/ChurchCRM/CRM/security/advisories/GHSA-8r36-fvxj-26qv and the fixing pull request at https://github.com/ChurchCRM/CRM/pull/8016.

OWASP Top 10 for Web (2025)

A05:2025 Injection

EU & UK References

Vulnerability Data

ChurchCRM is an open-source church management system. Prior to 7.0.0, a stored cross-site scripting (XSS) vulnerability exists in ChurchCRM within the Person Property Management subsystem. This issue persists in versions patched for CVE-2023-38766 and allows an authenticated user to inject…

more

arbitrary JavaScript code via dynamically assigned person properties. The malicious payload is persistently stored and executed when other users view the affected person profile or access the printable view, potentially leading to session hijacking or full account compromise. This vulnerability is fixed in 7.0.0.

CWE(s)
CWE-79

Related Threats

MITRE ATT&CK Enterprise Techniques

T1185 Browser Session Hijacking Collection
Adversaries may take advantage of security vulnerabilities and inherent functionality in browser software to change content, modify user-behaviors, and intercept information as part of various browser session hijacking techniques.
attack.mitre.org →
T1189 Drive-by Compromise Initial Access
Adversaries may gain access to a system through a user visiting a website over the normal course of browsing.
attack.mitre.org →
T1190 Exploit Public-Facing Application Initial Access
Adversaries may attempt to exploit a weakness in an Internet-facing host or system to initially access a network.
attack.mitre.org →
T1539 Steal Web Session Cookie Credential Access
An adversary may steal web application or service session cookies and use them to gain access to web applications or Internet services as an authenticated user without needing credentials.
attack.mitre.org →
T1659 Content Injection Initial Access
Adversaries may gain access and continuously communicate with victims by injecting malicious content into systems through online network traffic.
attack.mitre.org →
Derived from this CVE’s CWE(s) via the direct CWE→ATT&CK cross-walk.

CVEs Like This One

CVE-2023-38761Same product: Churchcrm Churchcrm
CVE-2023-25347Same product: Churchcrm Churchcrm
CVE-2023-24690Same product: Churchcrm Churchcrm
CVE-2023-33661Same product: Churchcrm Churchcrm
CVE-2023-38766Same product: Churchcrm Churchcrm
CVE-2023-27059Same product: Churchcrm Churchcrm
CVE-2023-24686Same product: Churchcrm Churchcrm
CVE-2023-31548Same product: Churchcrm Churchcrm
CVE-2023-26842Same product: Churchcrm Churchcrm
CVE-2023-26843Same product: Churchcrm Churchcrm

Affected Assets

churchcrm
churchcrm
≤ 7.0.0

Mitigating Controls

Control response

Prevent
Stop it (NIST 800-53)

—

Detect
Catch it (NIST detect / respond)

—

Harden
Shrink the surface (DISA STIG)

—

Validate
Prove the fix (OWASP ASVS)
  • V1.1.2
  • V1.3.2

Mitigating Controls (NIST 800-53 r5) AI

SA-11 Developer Testing and Evaluation good match

Developer testing and evaluation can discover missing or incorrect input neutralization through targeted web-application tests.

SI-10 Information Input Validation good match

Input validation directly enforces neutralization of untrusted data before it reaches web output generation.

SI-15 Information Output Filtering good match

Output filtering can catch or sanitize unneutralized script content before it is served to users.

Mitigating Controls (NIST CSF 2.0) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.

PR.PS-06 mostly match
prevents

Secure SDLC practices directly target introduction of XSS via coding standards/testing (mostly), yet the single broad outcome leaves many specific neutralization vectors unaddressed (partial).

PR.PS-02 partial match
prevents

Patching and EOL replacement can remediate known XSS instances in libraries or frameworks (partial) but do nothing to enforce input neutralization in application code (none).

Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.

A.5.6 Contact with special interest groups partial match
prevents

Knowledge exchange on emerging attack techniques and patches reduces the likelihood that cross-site scripting flaws remain unaddressed in deployed applications.

A.5.7 Threat intelligence partial match
prevents

Operational indicators of compromise for web-application attacks can be incorporated into WAF or input-filtering rules, lowering the likelihood that unsanitized data reaches the browser.

A.8.25 Secure development life cycle partial match
prevents

Requiring language-specific secure-coding standards and automated scanning during the SDLC catches missing output encoding or improper neutralization of untrusted data before the software reaches production.

A.8.28 Secure coding partial match
prevents

Secure-coding standards, SAST scans and removal of insecure code samples together eliminate the failure to neutralize script content that produces cross-site scripting flaws.

A.8.29 Security testing in development and acceptance partial match
finds

Secure-coding testing and automated code-analysis tools are applied to detect improper neutralization of script-related content during web-page generation.

References