How severe is CVE-2020-15303?

CVE-2020-15303 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2020-15303 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (54th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-15303?

CVE-2020-15303 primarily affects Infoblox Nios. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2020-15303?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2020-15303 published?

CVE-2020-15303 was published on 2021-06-28 and last updated on 2026-06-17.

CVE-2020-15303

CVE-2020-15303 is a medium-severity vulnerability in Infoblox Nios with a CVSS 3.x base score of 6.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-776.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
CVSS v2: 4.0
EPSS exploit prediction: 1% (54th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-776
Affected product: Infoblox Nios
Published: 2021-06-28
Last modified: 2026-06-17

Description

Infoblox NIOS before 8.5.2 allows entity expansion during an XML upload operation, a related issue to CVE-2003-1564.

Frequently asked questions

What is CVE-2020-15303?: Infoblox NIOS before 8.5.2 allows entity expansion during an XML upload operation, a related issue to CVE-2003-1564.
How severe is CVE-2020-15303?: CVE-2020-15303 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2020-15303 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (54th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-15303?: CVE-2020-15303 primarily affects Infoblox Nios. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2020-15303?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2020-15303 published?: CVE-2020-15303 was published on 2021-06-28 and last updated on 2026-06-17.

References

Affected products (3)

cpe:2.3:o:infoblox:nios:*:*:*:*:*:*:*:*
cpe:2.3:o:infoblox:nios:8.5.0:*:*:*:*:*:*:*
cpe:2.3:o:infoblox:nios:8.5.1:*:*:*:*:*:*:*

More vulnerabilities in Infoblox Nios

CVE-2024-37566 — Critical (CVSS 9.8): Infoblox NIOS through 8.6.4 has Improper Authentication for Grids.
CVE-2024-36047 — Critical (CVSS 9.8): Infoblox NIOS through 8.6.4 and 9.x through 9.0.3 has Improper Input Validation.
CVE-2024-36046 — Critical (CVSS 9.8): Infoblox NIOS through 8.6.4 executes with more privileges than required.
CVE-2024-37567 — Critical (CVSS 9.1): Infoblox NIOS through 8.6.4 has Improper Access Control for Grids.
CVE-2025-61880 — High (CVSS 8.8): In Infoblox NIOS through 9.0.7, insecure deserialization can result in remote code execution.
CVE-2023-37249 — High (CVSS 8.8): Infoblox NIOS through 8.5.1 has a faulty component that accepts malicious input without sanitization, resulting in…

All CVEs affecting Infoblox Nios →

Other CWE-776 vulnerabilities

CVE-2019-19144 — Critical (CVSS 9.8): XML External Entity Injection vulnerability in Quantum DXi6702 2.3.0.3 (11449-53631 Build304) devices via…
CVE-2022-23640 — Critical (CVSS 9.8): Excel-Streaming-Reader is an easy-to-use implementation of a streaming Excel reader using Apache POI. Prior to…
CVE-2014-2228 — Critical (CVSS 9.8): The XStream extension in HP Fortify SCA before 2.2 RC3 allows remote attackers to execute arbitrary code via unsafe…
CVE-2013-4335 — Critical (CVSS 9.8): opOpenSocialPlugin 0.8.2.1, > 0.9.9.2, 0.9.13, 1.2.6: Multiple XML External Entity Injection Vulnerabilities
CVE-2021-23926 — Critical (CVSS 9.1): The XML parsers used by XMLBeans up to version 2.6.0 did not set the properties needed to protect the user from…
CVE-2020-24590 — Critical (CVSS 9.1): The Management Console in WSO2 API Manager through 3.1.0 and API Microgateway 2.2.0 allows XML Entity Expansion attacks.

Browse all CWE-776 vulnerabilities →