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CVE record · CVE-2021-29447

WordPress Authenticated XXE attack when installation is running PHP 8

CVSS 7.1 HighCriticalEPSS 0.86 · 99th percentile

Critical, because:

  • CVSS score 7.1 (7.0 or more) and EPSS 0.86 (0.1 or more): a high score and a real chance of exploitation in the next 30 days.

How we decide what’s critical

Published by the CVE Program (CNA: GitHub_M) at 15 Apr 2021, 21:10 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

Affected products, as the CNA wrote them
VendorProductVersions
WordPress wordpress-develop
  • affected >= 5.6.0, < 5.7.1
Identifiers
CVE-2021-29447
CNA
GitHub_M
Weakness (CWE)
CWE-611
Tags
Published
15 Apr 2021
Updated
3 Aug 2024

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

ScoreRatingCVSSVectorSource
7.1 High 3.1 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N CNA (GitHub_M)
  • CISA KEV Not listed.
  • EPSS 0.86, the 99th percentile, on 12 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

This record came from the full history of the CVE Program, published 15 Apr 2021. New records show when each source confirmed them.

Sources

References from the CNA

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.