XXE in Wordpress
CVE-2021-29447
Wordpress is an open source CMS. A user with the ability to upload files (like an Author) can exploit an XML parsing issue in the Media Library leading to XXE attacks. This requires WordPress installation to be using PHP 8. Access to inter…
Vulnerability class: XXE (XML External Entity)
EPSS: 0.857 (99.7th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N.
Affected products
- Wordpress
- Wordpress Wordpress-develop — versions >= 5.6.0, < 5.7.1
- Debian Debian_linux — versions 9.0, 10.0
Weakness classification (CWE)
Public proof-of-concept exploits
- motikan2010/CVE-2021-29447
- mega8bit/exploit_cve-2021-29447
- 0xRar/CVE-2021-29447-PoC
- M3l0nPan/wordpress-cve-2021-29447
- Vulnmachines/wordpress_cve-2021-29447
- thomas-osgood/CVE-2021-29447
- elf1337/blind-xxe-controller-CVE-2021-29447
- dnr6419/CVE-2021-29447
- Tea-On/CVE-2021-29447-Authenticated-XXE-WordPress-5.6-5.7
- Abdulazizalsewedy/CVE-2021-29447
References
- security-advisories@github.com (x_refsource_CONFIRM, Third Party Advisory)
- security-advisories@github.com (x_refsource_MISC, Release Notes, Vendor Advisory)
- security-advisories@github.com (mailing-list, x_refsource_MLIST, Mailing List, Third Party Advisory)
- security-advisories@github.com (vendor-advisory, Third Party Advisory, x_refsource_DEBIAN)
- security-advisories@github.com (VDB Entry, Third Party Advisory, x_refsource_MISC)
- security-advisories@github.com (Exploit, VDB Entry, Third Party Advisory, x_refsource_MISC)
- security-advisories@github.com (Exploit, Third Party Advisory, x_refsource_MISC)
Frequently asked questions
- What is CVE-2021-29447?
- CVE-2021-29447 is a high-severity vulnerability in Wordpress, classified under Improper Restriction of XML External Entity Reference (XXE). CVSS score: 7.1/10. Published 2021-04-15.
- How severe is CVE-2021-29447?
- High severity. CVSS v3 base score is 7.1 out of 10.
- Is CVE-2021-29447 known to be exploited?
- 135 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.