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CVE-2026-21430

Emlog cross-site request forgery (CSRF)

9.3 CRITICALPublic exploitEPSS 0.18%
  1. Published2 Jan 2026

Description

Emlog is an open source website building system. In version 2.5.23, article creation functionality is vulnerable to cross-site request forgery (CSRF). This can lead to a user being forced to post an article with arbitrary, attacker-controlled content. This, when combined with stored cross-site scripting, leads to account takeover. As of time of publication, no known patched versions are available.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionRequired
ScopeChanged
ConfidentialityHigh
IntegrityHigh
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N

Affected products

Emlog2.5.23

Remediation

No fixed version is recorded in the NVD data. Check the vendor advisory for the latest guidance.

References

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Frequently asked

Is CVE-2026-21430 being actively exploited?

CVE-2026-21430 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 0.18%.

How severe is CVE-2026-21430?

CVE-2026-21430 has a CVSS 3.1 base score of 9.3, rated critical. EPSS estimates a 0.18% probability of exploitation.

Which products are affected by CVE-2026-21430?

Affected products include Emlog.

How do I fix CVE-2026-21430?

Apply the vendor's patch or advisory guidance, then verify no affected versions remain across your devices.

How Secuno handles this

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.