Published:2021/11/10 Last Updated:2021/11/10
JVN#68066589
WordPress Plugin "Booking Package - Appointment Booking Calendar System" vulnerable to cross-site scripting
Overview
WordPress Plugin "Booking Package - Appointment Booking Calendar System" contains a cross-site scripting vulnerability.
Products Affected
- Booking Package - Appointment Booking Calendar System versions prior to 1.5.11
Description
WordPress Plugin "Booking Package - Appointment Booking Calendar System" provided by Saasproject contains a cross-site scripting vulnerability (CWE-79) due to the flaw in handling some URL query parameters.
Impact
An arbitrary script may be executed on the web browser of the user who is accessing the website using the product.
Solution
Update the plugin
Update the plugin according to the information provided by the developer.
Vendor Status
| Vendor | Link |
| Saasproject | Fixed a cross-site scripting vulnerability (Only in Japanese) |
| Booking Package |
References
JPCERT/CC Addendum
Vulnerability Analysis by JPCERT/CC
CVSS v3
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Base Score:
6.1
| Attack Vector(AV) | Physical (P) | Local (L) | Adjacent (A) | Network (N) |
|---|---|---|---|---|
| Attack Complexity(AC) | High (H) | Low (L) | ||
| Privileges Required(PR) | High (H) | Low (L) | None (N) | |
| User Interaction(UI) | Required (R) | None (N) | ||
| Scope(S) | Unchanged (U) | Changed (C) | ||
| Confidentiality Impact(C) | None (N) | Low (L) | High (H) | |
| Integrity Impact(I) | None (N) | Low (L) | High (H) | |
| Availability Impact(A) | None (N) | Low (L) | High (H) |
CVSS v2
AV:N/AC:M/Au:N/C:N/I:P/A:N
Base Score:
4.3
| Access Vector(AV) | Local (L) | Adjacent Network (A) | Network (N) |
|---|---|---|---|
| Access Complexity(AC) | High (H) | Medium (M) | Low (L) |
| Authentication(Au) | Multiple (M) | Single (S) | None (N) |
| Confidentiality Impact(C) | None (N) | Partial (P) | Complete (C) |
| Integrity Impact(I) | None (N) | Partial (P) | Complete (C) |
| Availability Impact(A) | None (N) | Partial (P) | Complete (C) |
Credit
Gen Sato of Mitsui Bussan Secure Directions, Inc. reported this vulnerability to IPA.
JPCERT/CC coordinated with the developer under Information Security Early Warning Partnership.
Other Information
| JPCERT Alert |
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| JPCERT Reports |
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| CERT Advisory |
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| CPNI Advisory |
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| TRnotes |
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| CVE |
CVE-2021-20840 |
| JVN iPedia |
JVNDB-2021-000094 |