Facebook Chat Plugin <= 1.5 — Missing Capabilities Check
CVE-2020-36838Published · Updated Action summary
Affected: <1.6Update to 1.6 or newer
All remediation steps- Severity
- High7.4
- CVSS
- 7.4CVSS 3.1 · CNA (Wordfence)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:LWhat does this vector mean?
AV:NAttack vector- Network
AC:LAttack complexity- Low
PR:LPrivileges required- Low
UI:NUser interaction- None
S:CScope- Changed
C:LConfidentiality- Low
I:LIntegrity- Low
A:LAvailability- Low
- Weakness
- CWE-284 Improper Access Control
- Required access
- Unknown
- Exploit prediction (EPSS)
- No score
- CISA KEV
- Not listed
On this page8
Am I affected?
Facebook Chat Plugin – Live Chat Plugin for WordPress facebook-messenger-customer-chat
- Affected< 1.6
- Patched in1.6
Update to 1.6 or newer.
You are affected if you run < 1.6. Version 1.6 and later are not affected by this issue.
- Check your version: in wp-admin go to Plugins → Installed Plugins and read the version under Facebook Chat Plugin – Live Chat Plugin for WordPress.
- No admin access? Run a passive check of your site. It reads public files only.
What to do
- Update to version 1.6, or a newer patched version
- Rotate administrator passwords and application secrets if the site ran a vulnerable version while publicly reachable.
- Watch Facebook Chat Plugin – Live Chat Plugin for WordPress to get an email when the next vulnerability is published.
Advisory
Source description from Wordfence Intelligence, credited to Chloe Chamberland.
The Facebook Chat Plugin for WordPress is vulnerable to authorization bypass due to a missing capability check on the wp_ajax_update_options function in versions up to, and including, 1.5. This flaw makes it possible for low-level authenticated attackers to connect their own Facebook Messenger account to any site running the vulnerable plugin and engage in chats with site visitors on affected sites.
Exploits & references
Proof-of-concept & detection
No public proof-of-concept or detection template is known for this vulnerability.
Advisories & patches
- Advisorywordfence.com
Related CVEs
More in Facebook Chat Plugin – Live Chat Plugin for WordPress
All 2| Severity | Vulnerability | CVE | Published |
|---|---|---|---|
| Medium4.3 | Cross-Site Request Forgery to Site Settings Changes <1.3Update to 1.3 | — |
- Medium4.3Cross-Site Request Forgery to Site Settings Changes
<1.3Update to 1.3
Timeline
CVE published
Severity high, CVSS 7.4
Record last updated
Sources & licenses
Wordfence record- Vulnerability data
- Wordfence Intelligence. [object Object] Licensed under the CC BY-SA 4.0.
- CVE® identifiers
- [object Object]. Used under the CVE Program. CVE® is a registered trademark of The MITRE Corporation.
- CVSS / CWE
- National Vulnerability Database (NVD), shown unmodified. This product uses the NVD API but is not endorsed or certified by the NVD.
- VulnCrest content
- Summary, remediation guidance and page layout © VulnCrest. Not sourced from NVD.