Security Digest · Vulnerability record
CVE-2023-49733: Apache Cocoon Improper Restriction of XML External Entity Reference vulnerability
Improper Restriction of XML External Entity Reference vulnerability in Apache Cocoon.This issue affects Apache Cocoon: from 2.2.0 before 2.3.0.
CVSS 9.8 Critical EPSS 1.3% · p70
Should you act?
Critical and remotely reachable
No known exploitation yet, but it is network-reachable without credentials. This signal is computed from CISA KEV, EPSS and CVSS data; it is not an editorial verdict.
- No confirmed exploitation. It is not in CISA’s KEV catalog. That can change quickly after a public write-up; re-check if you are affected.
- EPSS 1.3%, percentile 70: FIRST’s model estimates a 1.3% chance of exploitation activity in the next 30 days, higher than 70% of all scored CVEs (moderate). EPSS is a probability, not a verdict.
- Remotely reachable with no login and no user interaction. If the vulnerable service is exposed to the internet, prioritize it.
- Only applies if your dependency tree includes
org.apache.cocoon:cocoon(Maven) >= 2.2.0, < 2.3.0, fixed in 2.3.0. Check your lockfile, including transitive dependencies.
What it is
Improper Restriction of XML External Entity Reference vulnerability in Apache Cocoon.This issue affects Apache Cocoon: from 2.2.0 before 2.3.0. Users are recommended to upgrade to version 2.3.0, which fixes the issue.
From the GitHub advisory
Improper Restriction of XML External Entity Reference vulnerability in Apache Cocoon. This issue affects Apache Cocoon: from 2.2.0 before 2.3.0.
Users are recommended to upgrade to version 2.3.0, which fixes the issue.
Weakness type: CWE-611.
Product: org.apache.cocoon:cocoon (Maven) · Assigned by: apache · Published: 2023-11-30
Affected and fixed versions
| Ecosystem | Package | Vulnerable | First fixed |
|---|---|---|---|
| Maven | org.apache.cocoon:cocoon | >= 2.2.0, < 2.3.0 | 2.3.0 |
| Vendor | Product | Affected versions (per CVE record) |
|---|---|---|
| Apache Software Foundation | Apache Cocoon | 2.2.0 < 2.3.0 |
Severity scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| GitHub | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
- Attack vector: network (remotely reachable)
- Attack complexity: low
- Privileges required: none (no login)
- User interaction: none
- Scope: unchanged
CVSS measures how bad a flaw is if exploited, not how likely exploitation is. Read it next to the exploitation data below.
Exploitation and urgency
- CISA KEV: not listed (no confirmed in-the-wild exploitation known to CISA).
- FIRST EPSS (model of 2026-10-21): 1.29% probability of exploitation activity in the next 30 days; percentile 70.
Timeline
- — CVE record published by apache
- — GitHub-reviewed advisory GHSA-77jg-cpw9-73vg published (critical)
- — CVE record last updated
Sources and references
Original sources first. Version and fix details should always be confirmed against the vendor or project advisory.
Vendor and project advisories, patches
- lists.apache.org lists.apache.org
Vulnerability records
- GitHub Advisory GHSA-77jg-cpw9-73vg github.com
- CVE.org record CVE-2023-49733 cve.org
- NVD entry CVE-2023-49733 nvd.nist.gov
Other references from the CVE record and advisory
- openwall.com openwall.com