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CVE-2020-15303

21
FAUCET Score

CVE-2020-15303 is a medium-severity vulnerability affecting Infoblox NIOS versions prior to 8.5.2, allowing for entity expansion during XML upload operations, a type of XML External Entity (XXE) attack. This flaw can lead to a denial of service (DoS) by exhausting system resources. While the attack can be performed remotely with low privileges and complexity, there is no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
>= 8.4.0, <= 8.4.8CPE matchmatch criteria
cpe:2.3:o:infoblox:nios:*:*:*:*:*:*:*:*
8.5.0CPE matchmatch criteria
cpe:2.3:o:infoblox:nios:8.5.0:*:*:*:*:*:*:*
8.5.1CPE matchmatch criteria
cpe:2.3:o:infoblox:nios:8.5.1:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

6.5MEDIUM

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.86%
Probability of exploitation in next 30 days
EPSS Percentile
54.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0086 is in the 67th percentile among its peer group of 21,977 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

community.infoblox.com / t5/Security/NIOS-XML-Vulnerability/m-p/22437
Vendor Advisory
infoblox.com / products/nios8
ProductVendor Advisory