CVE-2025-47784: Emlog vulnerable to Deserialization of Untrusted Data

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-05-15 · updated 2026-06-17
Weakness: CWE-502

Description

Emlog is an open source website building system. Versions 2.5.13 and prior have a deserialization vulnerability. A user who creates a carefully crafted nickname can cause `str_replace` to replace the value of `name_orig` with empty, causing deserialization to fail and return `false`. Commit 9643250802188b791419e3c2188577073256a8a2 fixes the issue.

Affected products

emlog: before 2.5.14 — fixed in 2.5.14

How to fix

Upgrade to a fixed version: emlog 2.5.14. Check the vendor advisory for mitigations.

References

https://github.com/emlog/emlog/commit/9643250802188b791419e3c2188577073256a8a2
https://github.com/emlog/emlog/security/advisories/GHSA-f56g-m99v-mqc3

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