GHSA-7fm6-2qw4-g3x3 · Severity: critical · Ecosystem: maven — Deserialization of Untrusted Data in 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.
Conclusion & alert: CVE-2018-18628 is rated High Exploit Risk (85.1/100): CVSS Critical severity, with medium exploitation likelihood (EPSS 4.17%). Core evidence: 1 public exploit reference(s) are indexed (Exploit-DB). Mandatory action: Public exploits are available—assess exposure, apply mitigations, and prioritize patching.
Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.
| EDB-ID | Source | Kind | Published | Link |
|---|---|---|---|---|
| — | nvd_ref | exploit_tag | Exploit-DB ↗ |
EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).
| # | Date | Old EPSS score | New EPSS score | Delta (New - Old) |
|---|---|---|---|---|
| 1 | 2026-05-09 | 4.38% | 4.17% | -0.21% |
| 2 | 2025-11-21 | 5.67% | 4.38% | -1.28% |
| 3 | 2025-11-18 | — | 5.67% | — |
Full EPSS history (13 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 9.8 | 3.0 | CRITICAL |
|
3.9 | 5.9 | [email protected] |
| 10.0 | 2.0 | HIGH |
|
10.0 | 10.0 | [email protected] |
GHSA-7fm6-2qw4-g3x3 · Severity: critical · Ecosystem: maven — Deserialization of Untrusted Data in Pippo
| URL | Tags |
|---|---|
| https://github.com/pippo-java/pippo/issues/458 | Exploit Patch Third Party Advisory |