How severe is CVE-2026-25519?

CVE-2026-25519 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-25519 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (39th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-25519?

CVE-2026-25519 affects Openslides. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-25519?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-25519 have an EU (EUVD) identifier?

Yes. CVE-2026-25519 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-5342.

When was CVE-2026-25519 published?

CVE-2026-25519 was published on 2026-02-04 and last updated on 2026-06-17.

CVE-2026-25519

CVE-2026-25519 is a high-severity vulnerability in Openslides with a CVSS 3.x base score of 8.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-284.

Key facts

Severity: High (CVSS 3.x base score 8.1)
EPSS exploit prediction: 0% (39th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-5342
Weakness: CWE-284
Affected product: Openslides
Published: 2026-02-04
Last modified: 2026-06-17

Description

OpenSlides is a free, web based presentation and assembly system for managing and projecting agenda, motions and elections of an assembly. Prior to version 4.2.29, OpenSlides supports local logins with username and password or an optionally configurable single sign on with SAML via an external IDP. For users synced to OpenSlides via an external IDP, there is an incorrect access control regarding the local login of these users. Users can successfully login using the local login form and the OpenSlides username of a SAML user and a trivial password. This password is valid for all SAML users. This issue has been patched in version 4.2.29.

Frequently asked questions

What is CVE-2026-25519?: OpenSlides is a free, web based presentation and assembly system for managing and projecting agenda, motions and elections of an assembly. Prior to version 4.2.29, OpenSlides supports local logins with username and password or an optionally configurable single sign on with SAML via an external IDP. For users synced to OpenSlides via an external IDP, there is an incorrect access control regarding the local login of these users. Users can successfully login using the local login form and the OpenSlides username of a SAML user and a trivial password. This password is valid for all SAML users. This issue has been patched in version 4.2.29.
How severe is CVE-2026-25519?: CVE-2026-25519 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-25519 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (39th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-25519?: CVE-2026-25519 affects Openslides. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-25519?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-25519 have an EU (EUVD) identifier?: Yes. CVE-2026-25519 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-5342.
When was CVE-2026-25519 published?: CVE-2026-25519 was published on 2026-02-04 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:openslides:openslides:*:*:*:*:*:*:*:*

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