What is CVE-2025-47784?

CVE-2025-47784 is a critical-severity vulnerability in Emlog, classified under Deserialization of Untrusted Data. CVSS score: 9.8/10. Published 2025-05-15.

How severe is CVE-2025-47784?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Deserialization in Emlog

CVE-2025-47784

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.

Vulnerability class: Insecure Deserialization

Published 2025-05-15 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.005 (39.9th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 40th percentile — 39.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000

Affected products

Emlog — versions <= 2.5.13

Weakness classification (CWE)

CWE-502 — Deserialization of Untrusted Data

References

github.com/emlog/emlog/security/advisories/GHSA-f56g-m99v-mqc3 (Third Party Advisory)
github.com/emlog/emlog/commit/9643250802188b791419e3c2188577073256a8a2 (Patch)

Frequently asked questions

What is CVE-2025-47784?: CVE-2025-47784 is a critical-severity vulnerability in Emlog, classified under Deserialization of Untrusted Data. CVSS score: 9.8/10. Published 2025-05-15.
How severe is CVE-2025-47784?: Critical severity. CVSS v3 base score is 9.8 out of 10.