TI-2020-09651 Aliases CVE-2020-11991 GHSA-586v-g7r5-mhgp

XML external entity injection in Apache Cocoon

HIGH 71CWE-611Published 2020-09-11 · Updated 2024-08-04

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: Information disclosure
Confidentiality · integrity · availability: High · None · None
Fix status: No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-611 and the CVSS impact.

Summary

When using the StreamGenerator, the code parse a user-provided XML. A specially crafted XML, including external system entities, could be used to access any file on the server system.

Why it matters now

EPSS 0.72456 99th percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by NVD

Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
—	Apache Cocoon	Apache Cocoon 2.1.0 to 2.1.12	—	No fix listed	CNA

Apache Cocoon Vendor— Affected Apache Cocoon 2.1.0 to 2.1.12 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:apache:cocoon::::::::	2.1 – 2.1.12	Vulnerable	Apache

cpe:2.3:a:apache:cocoon:*:*:*:*:*:*:*:* Versions 2.1 – 2.1.12 Vulnerable ·Apache

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2020-11991
2026-10-03 Alias added: GHSA-586v-g7r5-mhgp

References

Exploit 1

https://lists.apache.org/thread.html/r77add973ea521185e1a90aca00ba9dae7caa8d8b944d92421702bb54%40%3Cusers.cocoon.apache.org%3E

TI-2022-22210 Apache Cocoon: SQL injection in DatabaseCookieAuthenticatorAction CVSS 3.1CRITICAL 9.8
TI-2003-01074 Directory traversal vulnerability in the view-source sample file in Apache Software… CVSS 2.0MEDIUM 5.0
TI-2023-27144 Apache Cocoon's StreamGenerator is vulnerable to XXE injection CVSS 3.1CRITICAL 9.8
TI-2025-18500 Apache Cocoon: continuations may not be private CVSS 3.1HIGH 7.5

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences