Is this vulnerability remotely exploitable?

Yes. Any user with network access to the OpenSlides login page can attempt to exploit the issue without prior authentication, provided they know or can guess valid SAML usernames.

What level of access does an attacker need to exploit this?

Only network access to the OpenSlides web interface is required. There is no need for valid credentials beforehand, though knowledge of or the ability to guess usernames for SAML-synced users is necessary.

What is the safest general fix pattern for this vulnerability class?

Enforce a clear separation of authentication mechanisms: accounts synchronized from SAML (or any external IdP) should be treated as SSO-only and must not accept local passwords. Remove any shared or hard-coded credential paths, and ensure all login verification flows route through the appropriate authority (IdP or local password store) based on account type.

Severity:

HIGH RISK

(8.1)

Improper Access Control (CWE-284) in OpenSlides SAML-Linked Local Logins

CVE-2026-25519

Published:

Feb 4, 2026

Status:

Awaiting Analysis

Summary

Affected Context

Exploit Preconditions

Why This Happens

Potential Impact

General Mitigation Guidance

How Teams Detect Issues Like This

Frequently Asked Questions

Source

NDV

Recent Vulnerabilities

CWE-306

CRITICAL RISK

CRITICAL

(9.8)

Missing Authentication for Forgot-Password Email Change API (CWE-306)

Account Takeover / Loss of Account Control

February 17, 2026

CWE-77;CWE-78

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in node-sonos-http-api TTS Provider for macOS

Remote Code Execution on the Server Host

February 17, 2026

Vulnerability Type

Category:

Improper Access Control

CWE:

CWE-284

Impact:

Authentication Bypass and Account Takeover

Severity:

HIGH RISK

(8.1)

CVSS Version:

3.1

Vulnerability Type

Category:

Improper Access Control

CWE:

CWE-284

Impact:

Authentication Bypass and Account Takeover

Severity:

HIGH RISK

(8.1)

CVSS Version:

3.1

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Ask AI for summary of CodeAnt

Improper Access Control (CWE-284) in OpenSlides SAML-Linked Local Logins

Summary

Affected Context

Exploit Preconditions

Why This Happens

Potential Impact

General Mitigation Guidance

How Teams Detect Issues Like This

Frequently Asked Questions

Source

Recent Vulnerabilities

CRITICAL RISK

CRITICAL

(9.8)

Missing Authentication for Forgot-Password Email Change API (CWE-306)

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in node-sonos-http-api TTS Provider for macOS

Vulnerability Type

Vulnerability Type

Vulnerability Type

Vulnerability Type

Catch This CVE While Code Is Being Written

Ship clean & secure code faster

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