How severe is CVE-2020-36640?

CVE-2020-36640 has a CVSS score of 9.8/10, rated CRITICAL. Immediate patching is strongly recommended.

Which packages are affected by CVE-2020-36640?

CVE-2020-36640 affects the following packages: org.bonitasoft.connectors:bonita-connector-webservice (Maven). Ecosystems affected: Maven.

How do I fix CVE-2020-36640?

Update org.bonitasoft.connectors:bonita-connector-webservice to 1.3.1 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2020-36640 is resolved across your whole dependency graph.

How do I detect CVE-2020-36640 in my Maven dependencies?

Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for org.bonitasoft.connectors:bonita-connector-webservice, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

How do I mitigate CVE-2020-36640 if there is no patch (or I can't update yet)?

If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

Is CVE-2020-36640 actively exploited in the wild?

No public exploit code has been indexed for CVE-2020-36640 yet. This does not mean the vulnerability cannot be exploited — absence of public exploits does not imply safety. Apply the recommended fix and use O3 Security to monitor your exposure.

What is the EPSS score for CVE-2020-36640?

CVE-2020-36640 has an EPSS (Exploit Prediction Scoring System) score of 0.8%, placing it in the 58th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. This score indicates relatively lower exploitation probability, though the CVSS severity should still guide your patching priority.

What type of vulnerability is CVE-2020-36640?

CVE-2020-36640 is classified as XML External Entity (XXE) (CWE-611). This weakness type describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation.

When was CVE-2020-36640 published, and has it been updated?

CVE-2020-36640 was published on January 5, 2023 and was last updated on October 20, 2026. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

☕

☕ Maven

Not in CISA KEV

CRITICAL severity

CVE-2020-36640 — bonita-connector-webservi…

CRITICALFix: bonitasoft/bonita-connector-webservice@a12ad69

CVE-2020-36640 is a critical-severity (CVSS 9.8) XML External Entity (XXE) vulnerability in org.bonitasoft.connectors:bonita-connector-webservice. A fix is available for org.bonitasoft.connectors:bonita-connector-webservice — see the affected versions and patch details below.

bonita-connector-webservice XML External Entity vulnerability

Also known asGHSA-wg99-5vrx-j2gg

Published

Jan 5, 2023

Updated

Oct 20, 2026

Affected

1 pkg

Patched

1 / 1

Exploits

None indexed

Exploitation data as of Nov 5, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

Exploitation Status

No confirmed exploitation observed yet

CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.

Exploitation and automatability from CISA’s SSVC triage for CVE-2020-36640.

EPSS Exploitation Probability

via FIRST.org ↗

0.8%probability of exploitation in next 30 days

Lower Risk+0.03%

Lower risk than most CVEs58th percentile — riskier than 58% of all scored CVEsHighest risk

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

1 pkg affected

☕org.bonitasoft.connectors:bonita-connector-webservice

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Maven packages — download data is not available via public APIs for these ecosystems.

Description

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.

Affected Packages

1 total 1 fixed

Ecosystem	Package	Vulnerable range	Fix
☕Maven	`org.bonitasoft.connectors:bonita-connector-webservice`	all versions	1.3.1`org.bonitasoft.connectors:bonita-connector-webservice:1.3.1`

Affected Products

1 product · 1 configurations

Application

webservice connectorbonitasoft

< 1.3.1

range

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for org.bonitasoft.connectors:bonita-connector-webservice, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update org.bonitasoft.connectors:bonita-connector-webservice to 1.3.1 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2020-36640 is resolved across your whole dependency graph.
Workarounds
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

Frequently Asked Questions

O3 Security · Impact-Aware SCA

Is CVE-2020-36640 in your dependencies?

Find it across Maven, including transitive dependencies.

Scan my dependencies How O3 SCA works

CVSS Score

9.8/10CVSS v3 base

Vector breakdown

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Raw vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CWE Classification

CWE-611XML External Entity (XXE)

Weaponization

No Nuclei template, Metasploit module or public proof-of-concept found.

OpenSSF Scorecard

Package health score

bonita-connector-webservice

3.5/10

Code-Review1/10

Maintained0/10

Branch-Protection3/10

Assessed Nov 2, 2026

Timeline

Disclosed

Jan 5, 2023

Last updated

Oct 20, 2026

Identifiers

CVE-2020-36640

GHSA-wg99-5vrx-j2gg

References

Advisorygithub.com · 1.3.1 Advisoryvuldb.com Advisoryvuldb.com Advisorynvd.nist.gov · CVE 2020 36640 Fixgithub.com · a12ad691c05af19e9061d7949b6b828ce48815d5 Fixgithub.com Packagegithub.com · bonita connector webservice

Related vulnerabilities

This CVE is critical severity; 1 of 8 other CVEs with CWE-611 is rated as high or higher (top: critical).

CVE-2026-108358CVE-2026-108357CVE-2026-61586CVE-2026-61741CVE-2026-61570CVE-2026-55848CVE-2026-54079CVE-2026-54078Browse all CWE-611

Provenance

Sources

OSV.devNVDFIRST.org (EPSS)

Last verifiedOct 20, 2026

CVE-2020-36640 — bonita-connector-webservi…

Exploitation Status

No confirmed exploitation observed yet

EPSS Exploitation Probability

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

Description

Affected Packages

Affected Products

Detection & mitigation playbook

Detect

Fix

Workarounds

Frequently Asked Questions

Is CVE-2020-36640 in your dependencies?