CVE-2021-29447

Exploitation

Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.

SSVC decision

Not assessed by CISA

EPSS probability

85.72% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 99.7% of scored records. A rank, not a probability.

NVD base score

6.5 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

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

NVD analysis status

Modified. NVD last modified this record on 2026-06-17.

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2021-04-15 21:10Z5 YR AGO

Last updated

2024-08-03 22:02Z2 YR AGO

Reserved

2021-03-30

Assigning CNA

GitHub_M

Record state

PUBLISHED

Severity

High (CVSS 7.1)

CNA CVSS vector

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

Weaknesses

• CWE-611Improper Restriction of XML External Entity ReferenceBase

Data version

5.1

Document digest

c65c9eb229a8deadb2d57ce0c832138696e766ee651ad1086922dc3a8144c8b7

• github.comhttps://github.com/WordPress/wordpress-develop/security/advisories/GHSA-rv47-pc52-qrhhx_refsource_CONFIRM
• wordpress.orghttps://wordpress.org/news/category/security/x_refsource_MISC
• lists.debian.org[debian-lts-announce] 20210421 [SECURITY] [DLA 2630-1] wordpress security updatehttps://lists.debian.org/debian-lts-announce/2021/04/msg00017.htmlmailing-listx_refsource_MLIST
• www.debian.orgDSA-4896https://www.debian.org/security/2021/dsa-4896vendor-advisoryx_refsource_DEBIAN
• packetstormsecurity.comhttp://packetstormsecurity.com/files/163148/XML-External-Entity-Via-MP3-File-Upload-On-WordPress.htmlx_refsource_MISC
• packetstormsecurity.comhttp://packetstormsecurity.com/files/164198/WordPress-5.7-Media-Library-XML-Injection.htmlx_refsource_MISC
• blog.sonarsource.comhttps://blog.sonarsource.com/wordpress-xxe-security-vulnerability/x_refsource_MISC