CVE-2021-20840
MEDIUM
6.1
CVSS Score
Published: November 24, 2021 at 08:25 AM UTC
Updated: June 17, 2026 at 03:34 AM UTC
1 product affected across 1 vendorBooking Package
Using Booking Package - Appointment Booking Calendar System by Saasproject?
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Severity
MEDIUM6.1
Exploit prediction
EPSS 1%
Description
Cross-site scripting vulnerability in Booking Package - Appointment Booking Calendar System versions prior to 1.5.11 allows a remote attacker to inject an arbitrary script via unspecified vectors.
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
Booking Package· Saasprojectwordpress-plugin
95%v < 1.5.11
Affected range stops below 1.5.11, so it looks safe — our inference, not a vendor statement
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
Patch and advisory references
References (3)
x_refsource_MISCThird Party Advisory
Source: [email protected]
https://jvn.jp/en/jp/JVN68066589/index.htmlx_refsource_MISCVendor Advisory
Source: [email protected]
https://saasproject.net/ja/fixed/20211019.phpCVSS
- Attack Vector
- NETWORK
- Complexity
- LOW
- Privileges
- NONE
- User Interaction
- REQUIRED
- Scope
- CHANGED
- Confidentiality
- LOW
- Integrity
- LOW
- Availability
- NONE
Vector?
Quick Info
StatusMODIFIED
CWE
CWE-79
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