What is CVE-2023-49777?

CVE-2023-49777 is a critical-severity vulnerability in Yith Woocommerce Product Add-Ons, classified under Deserialization of Untrusted Data. CVSS score: 9.1/10. Published 2023-12-31.

How severe is CVE-2023-49777?

Critical severity. CVSS v3 base score is 9.1 out of 10.

Is CVE-2023-49777 known to be exploited?

2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Deserialization in Yith Woocommerce Product Add-Ons

CVE-2023-49777

Deserialization of Untrusted Data vulnerability in YITH YITH WooCommerce Product Add-Ons.This issue affects YITH WooCommerce Product Add-Ons: from n/a through 4.3.0.

Vulnerability class: Insecure Deserialization

Published 2023-12-31 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.007 (50.9th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 51st percentile — 50.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-502 — Deserialization of Untrusted Data

Public proof-of-concept exploits

References

patchstack.com/database/vulnerability/yith-woocommerce-product-add-ons/wordpres… (Third Party Advisory, vdb-entry)

Frequently asked questions

What is CVE-2023-49777?: CVE-2023-49777 is a critical-severity vulnerability in Yith Woocommerce Product Add-Ons, classified under Deserialization of Untrusted Data. CVSS score: 9.1/10. Published 2023-12-31.
How severe is CVE-2023-49777?: Critical severity. CVSS v3 base score is 9.1 out of 10.
Is CVE-2023-49777 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.