LiveActive security incident?Get immediate response
CVE Record

CVE-2021-30180: Apache Dubbo RCE on customers via Condition route poisoning (Unsafe YAML unmarshaling)

Apache Dubbo prior to 2.7.9 support Tag routing which will enable a customer to route the request to the right server. These rules are used by the customers when making a request in order to find the right endpoint. When parsing these YAML rules, Dubbo customers may enable calling arbitrary constructors.

UnknownCVSS not scoredNot KEV-listedUpdated
Discuss exposureBack to CVEs
Glexia's TakeAutomated analysishigh

Security readout for executives and security teams

Plain-English summary

Apache Dubbo 2.7.x before 2.7.9 can mishandle YAML routing rules used to direct service requests. If those rules are poisoned, Dubbo customers may trigger arbitrary constructors during parsing, creating remote code execution risk. Public sources do not provide a CVSS score or confirmed exploitation.

Executive priority

Prioritize if Dubbo 2.7.x is used in production or customer-facing service paths. RCE impact can be severe, but urgency should be based on confirmed Dubbo usage, Tag routing exposure, and who controls routing-rule changes.

Technical view

The CVE describes unsafe YAML unmarshaling in Apache Dubbo Tag routing before 2.7.9. When Dubbo consumers parse routing rules, attacker-influenced YAML may enable arbitrary constructor calls. The source bundle identifies Apache Dubbo 2.7.x as affected and frames the issue as RCE, but provides limited implementation detail.

Likely exposure

Likely exposed systems are Apache Dubbo 2.7.x deployments before 2.7.9 that use Tag routing and process YAML routing rules. Exposure is higher where routing configuration can be changed, supplied, or influenced outside tightly controlled administrative paths.

Exploitation context

The provided sources do not show CISA KEV listing, active exploitation, public exploit maturity, or weaponized details. The business concern is potential RCE through poisoned routing rules, but available evidence is limited to the CVE description and Apache mailing-list reference.

Researcher notes

The source bundle lacks CVSS, CWE, exploit status, and detailed patch notes. Treat the RCE characterization seriously, but avoid assuming internet-wide exploitability. Focus validation on Dubbo version, Tag routing usage, YAML rule provenance, and configuration-change access controls.

Mitigation direction

  • Identify Apache Dubbo 2.7.x deployments and their exact versions.
  • Upgrade affected Dubbo deployments to 2.7.9 or later, following Apache guidance.
  • Restrict who can create or modify Dubbo routing rules.
  • Treat routing YAML as sensitive configuration, not user-controlled input.
  • Review vendor advisory updates for additional hardening guidance.

Validation and detection

  • Check dependency manifests, lockfiles, and runtime artifacts for Apache Dubbo 2.7.x.
  • Confirm whether Tag routing is enabled in each Dubbo environment.
  • Review routing-rule administration paths for unauthorized or external influence.
  • Verify upgraded systems no longer run Dubbo versions before 2.7.9.
  • Document any compensating controls around routing configuration changes.
Prepared
Confidence
medium
Sources
3

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.

description · low confidence lookup

Execution behavior lookup

The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.

Open ATT&CK lookup
cve · low confidence lookup

CVE-2021-30180 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

Open ATT&CK lookup
Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors
0Timeline events
0ADP providers
2Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
Apache Software FoundationApache DubboApache Dubbo 2.7.xListed
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.