PT-2021-22551 · WordPress · Hal

Published 2021-10-15 · Updated 2021-10-20 · CVE-2021-39345

Positive Technologies (AI Summary)

CVSS v3.1

5.5

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions: HAL WordPress plugin versions up to and including 2.1.1

Description: The issue arises from insufficient input validation and sanitization via several parameters in the ~/wp-hal.php file, allowing attackers with administrative user access to inject arbitrary web scripts. This affects multi-site installations where unfiltered html is disabled for administrators, and sites where unfiltered html is disabled.

Recommendations: For versions up to and including 2.1.1, update to a version later than 2.1.1 to resolve the issue. As a temporary workaround, consider restricting administrative access to trusted users only and enabling unfiltered html for administrators if possible, to minimize the risk of exploitation.

Exploit

Fix

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2021-39345

Affected Products

Hal

References · 6

• 🔥 https://github.com/BigTiger2020/word-press/blob/main/HAL.md · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2021-39345 · Security Note
• https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old=2614075%40hal&new=2614075%40hal&sfp_email=&sfph_mail= · Patch
• https://osv.dev/vulnerability/CVE-2021-39345 · Vendor Advisory
• https://wordfence.com/vulnerability-advisories/#CVE-2021-39345 · Note
• https://t.me/cibsecurity/30614 · Telegram Post