There is a XML external entity (XXE) vulnerability in halo v1.1.3, The function of importing other blogs in the background(/api/admin/migrations/wordpress) needs to parse the xml file, but it is not used for security defense, This vulnerability can detect the intranet, read files, enable ddos attacks, etc. exp:https://github.com/halo-dev/halo/issues/423
Published 2020-09-30 18:15:24
Updated 2020-10-08 19:34:37
Source MITRE
View at NVD,   CVE.org
Vulnerability category: XML external entity (XXE) injection

Exploit prediction scoring system (EPSS) score for CVE-2020-21524

0.31%
Probability of exploitation activity in the next 30 days EPSS Score History
~ 67 %
Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2020-21524

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source First Seen
6.4
MEDIUM AV:N/AC:L/Au:N/C:P/I:N/A:P
10.0
4.9
NIST
9.1
CRITICAL CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
3.9
5.2
NIST

CWE ids for CVE-2020-21524

  • The product processes an XML document that can contain XML entities with URIs that resolve to documents outside of the intended sphere of control, causing the product to embed incorrect documents into its output.
    Assigned by: nvd@nist.gov (Primary)

References for CVE-2020-21524

Products affected by CVE-2020-21524

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