What is CVE-2020-36640?

CVE-2020-36640 is a medium-severity vulnerability in Bonitasoft Bonita-Connector-Webservice, classified under Improper Restriction of XML External Entity Reference (XXE). CVSS score: 5.5/10. Published 2023-01-05.

How severe is CVE-2020-36640?

Medium severity. CVSS v3 base score is 5.5 out of 10.

Is CVE-2020-36640 known to be exploited?

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

XXE in Bonitasoft Bonita-Connector-Webservice

CVE-2020-36640

A vulnerability, which was classified as problematic, was found in bonitasoft bonita-connector-webservice up to 1.3.0. This affects the function TransformerConfigurationException of the file src/main/java/org/bonitasoft/connectors/ws/SecureWSConnector.java. The manipulation leads to xml external entity reference. Upgrading to version 1.3.1 is able to address this issue. The patch is named a12ad691c05af19e9061d7949b6b828ce48815d5. It is recommended to upgrade the affected component. The associated identifier of this vulnerability is VDB-217443.

Vulnerability class: XXE (XML External Entity)

Published 2023-01-05 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L.

EPSS exploit prediction

EPSS: 0.008 (54.0th percentile), scored 2026-10-02.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 54th percentile — 54.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.008 · newest: 0.008 · change: +0.000

Affected products

Bonitasoft Bonita-Connector-Webservice — versions 1.0, 1.1, 1.2
Bonitasoft Webservice Connector

Weakness classification (CWE)

CWE-611 — Improper Restriction of XML External Entity Reference (XXE)

Public proof-of-concept exploits

Live-Hack-CVE/CVE-2020-36640

References

vuldb.com/ (technical-description, Third Party Advisory, vdb-entry)
vuldb.com/ (signature, permissions-required, Third Party Advisory)
github.com/bonitasoft/bonita-connector-webservice/pull/17 (issue-tracking, Patch)
github.com/bonitasoft/bonita-connector-webservice/commit/a12ad691c05af19e9061d7… (Patch, patch)
github.com/bonitasoft/bonita-connector-webservice/releases/tag/1.3.1 (Release Notes, patch)

Frequently asked questions

What is CVE-2020-36640?: CVE-2020-36640 is a medium-severity vulnerability in Bonitasoft Bonita-Connector-Webservice, classified under Improper Restriction of XML External Entity Reference (XXE). CVSS score: 5.5/10. Published 2023-01-05.
How severe is CVE-2020-36640?: Medium severity. CVSS v3 base score is 5.5 out of 10.
Is CVE-2020-36640 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.