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Vulnerability record · CVE-2018-18628 · published 23 October 2018

CVE-2018-18628: Pippo deserialization of untrusted data vulnerability

Pippo · Pippo

An issue was discovered in Pippo 1.11.0. The function SerializationSessionDataTranscoder.decode() calls ObjectInputStream.readObject() to deserialize a SessionData object without checking the object types. An attacker can create a malicious object, base64 encode it, and place it in the PIPPO_SESSION field of a cookie. Sending this cookie may lead to remote code execution.

9.8 CVSS 3.0 Critical EPSS 5.5% · top 7.5% CWE-502 · Deserialization of untrusted data
9.8CVSS 3.0 base score, v2 10.0
5.5%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

An issue was discovered in Pippo 1.11.0. The function SerializationSessionDataTranscoder.decode() calls ObjectInputStream.readObject() to deserialize a SessionData object without checking the object types. An attacker can create a malicious object, base64 encode it, and place it in the PIPPO_SESSION field of a cookie. Sending this cookie may lead to remote code execution.

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/pippo-java/pippo/issues/458 ExploitPatchThird Party Advisory
https://github.com/pippo-java/pippo/issues/458 ExploitPatchThird Party Advisory

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Source: NIST National Vulnerability Database (record CVE-2018-18628), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.