CVE-2020-11991
CVE-2020-11991 is a high-severity vulnerability in Apache Cocoon with a CVSS 3.x base score of 7.5. Its EPSS exploit-prediction score of 73% places it in the 99th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-611.
Key facts
- Severity: High (CVSS 3.x base score 7.5)
- CVSS v2: 5.0
- EPSS exploit prediction: 73% (99th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-611
- Affected product: Apache Cocoon
- Published:
- Last modified:
Description
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.
Frequently asked questions
- What is CVE-2020-11991?
- 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.
- How severe is CVE-2020-11991?
- CVE-2020-11991 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
- Is CVE-2020-11991 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 73% (99th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2020-11991?
- CVE-2020-11991 affects Apache Cocoon. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2020-11991?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
- When was CVE-2020-11991 published?
- CVE-2020-11991 was published on 2020-09-11 and last updated on 2026-06-17.
References
Affected products (1)
- cpe:2.3:a:apache:cocoon:*:*:*:*:*:*:*:*
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