7.1

CVE-2021-29447: debian debian_linux

CVSS: 7.1v3.1HighModified
AliasesUBUNTU-CVE-2021-29447DEBIAN-CVE-2021-29447
Published 15-04-2021Last modified 03-08-2024
Open JSON

Vulnerability summary

CVE-2021-29447 is a high (CVSS 7.1) vulnerability in debian debian_linux. EPSS estimates a 85.72% chance of exploitation in the next 30 days, higher than 99.7% of scored vulnerabilities. 3 public exploits are recorded.

Overall risk
56/100
0100
High · default modelHow is this calculated?
CVSS score
7.1/10
010
High · v3.1 (CVE.org)
EPSS score
85.72%
0%100%
Critical · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits3reference, exploit-database

Advisory lineage

Upstream 0 · Downstream 2
DLA-2630-1DSA-4896-1

Timeline

  1. 15-04-2021
    PublishedVulnerability first disclosed.
  2. 03-08-2024
    Last modifiedVulnerability information updated.

Description

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 internal files is possible in a successful XXE attack. This has been patched in WordPress version 5.7.1, along with the older affected versions via a minor release. We strongly recommend you keep auto-updates enabled.

CVSS metrics

6 scores · 5 sources · 2 versions

EPSS trend

Probability

85.72%

Chance of exploitation in the next 30 days

Percentile

100%

Versus all other CVEs

30-day change

0.00 pp

From 85.72% on 20-09-2026

20-09-202620-10-2026
EPSS score
85.72%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

3 found
  • referenceUnverified

    Exploit Reference (packetstormsecurity.com)

    Maturity: unknown

  • referenceUnverified

    Exploit Reference (blog.sonarsource.com)

    Maturity: unknown

  • exploit-databasephpUnverified

    WordPress 5.7 - 'Media Library' XML External Entity Injection (XXE) (Authenticated)

    Maturity: poc

Weaknesses

CWE · root cause

Affected systems

Wordpress3 products
  • wordpress≥ 4.7, < 4.7.20 | ≥ 4.8, < 4.8.16 (fixed in 4.7.20) | ≥ 4.9, < 4.9.17 (fixed in 4.7.20) | ≥ 5.0, < 5.0.12 (fixed in 4.7.20) | ≥ 5.1, < 5.1.9 (fixed in 4.7.20) | ≥ 5.2, < 5.2.10 (fixed in 4.7.20) | ≥ 5.3, < 5.3.7 (fixed in 4.7.20) | ≥ 5.4, < 5.4.5 (fixed in 4.7.20) | ≥ 5.5, < 5.5.4 (fixed in 4.7.20) | ≥ 5.6, < 5.6.3 (fixed in 4.7.20) | ≥ 5.7, < 5.7.1 (fixed in 4.7.20)
  • wordpress≥ 5.6.0, < 5.7.1
  • wordpress-develop≥ 5.6.0, < 5.7.1
Debian2 products
Ubuntu1 product
  • wordpressAll versions (No fix recorded)

3 vendors · 6 products

References

11 links
Show all 11 references