SB2026081599 - Multiple vulnerabilities in Emlog Pro

Description

This security bulletin contains information about 4 vulnerabilities.

1) Improper access control (CVE-ID: CVE-2026-21429)

CWE-ID: CWE-284 - Improper Access Control

CVSSv4: 5.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N]

The vulnerability allows a remote user to access restricted functionality.

The vulnerability exists due to improper access control in Emlog Pro when handling authenticated requests. A remote user can send a crafted request to access restricted functionality.

2) Cross-site request forgery (CVE-ID: CVE-2026-21430)

CWE-ID: CWE-352 - Cross-Site Request Forgery (CSRF)

CVSSv4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N]

The vulnerability allows a remote user to take over an account.

The vulnerability exists due to cross-site request forgery chained with stored cross-site scripting in the Emlog Pro application when handling crafted web requests and stored script content. A remote user can submit a crafted request and inject malicious script content to take over an account.

Exploitation requires authentication and relies on chaining both issues together.

3) Cross-site scripting (CVE-ID: CVE-2026-21431)

CWE-ID: CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

CVSSv4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N]

The vulnerability allows a remote user to execute arbitrary script code in a user\'s browser.

The vulnerability exists due to improper neutralization of input during web page generation in the image name field when rendering stored image names. A remote user can submit a specially crafted image name to execute arbitrary script code in a user\'s browser.

4) Cross-site scripting (CVE-ID: CVE-2026-21432)

CWE-ID: CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

CVSSv4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N]

The vulnerability allows a remote user to take over an administrator or another user account.

The vulnerability exists due to stored cross-site scripting in Emlog Pro when rendering stored user-supplied content. A remote user can inject a specially crafted script payload to take over an administrator or another user account.

User interaction is required to view the crafted content.

Remediation

Install update from vendor's website.

References

• https://github.com/emlog/emlog/security/advisories/GHSA-jw5v-2g53-rx8w
• https://github.com/emlog/emlog/security/advisories/GHSA-2g2w-vmg7-pq4q
• https://github.com/emlog/emlog/security/advisories/GHSA-9vc2-crhr-248x
• https://github.com/emlog/emlog/security/advisories/GHSA-4rxf-mjqx-c464