CVE-2021-24478
Bookshelf <= 2.0.4 - Authenticated Stored Cross-Site Scripting (XSS)
The Bookshelf WordPress plugin through 2.0.4 does not sanitise or escape its "Paypal email address" setting before outputting it in the page, leading to an authenticated Stored Cross-Site Scripting issue
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- Required
What an attacker can affect
- Confidentiality
- Low
- Integrity
- Low
- Availability
- None
Exploit likelihood
What each source reports
NVD Score used
The Bookshelf WordPress plugin through 2.0.4 does not sanitise or escape its "Paypal email address" setting before outputting it in the page, leading to an authenticated Stored Cross-Site Scripting issue
- Record
CVE-2021-24478- CVSS 3.1
- 5.4 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N - CVSS 2.0
- 3.5 Low
AV:N/AC:M/Au:S/C:N/I:P/A:N - Weakness
- CWE-79
- Updated
- 2026-11-02
CVE List No score
Bookshelf <= 2.0.4 - Authenticated Stored Cross-Site Scripting (XSS)
The Bookshelf WordPress plugin through 2.0.4 does not sanitise or escape its "Paypal email address" setting before outputting it in the page, leading to an authenticated Stored Cross-Site Scripting issue
- Record
CVE-2021-24478- Weakness
- CWE-79
- Updated
- 2026-11-02
EUVDEUVD-2021-11390 No score
The Bookshelf WordPress plugin through 2.0.4 does not sanitise or escape its "Paypal email address" setting before outputting it in the page, leading to an authenticated Stored Cross-Site Scripting issue
- Record
EUVD-2021-11390- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-7hv3-9hqr-c553 No score
The Bookshelf WordPress plugin through 2.0.4 does not sanitise or escape its "Paypal email...
The Bookshelf WordPress plugin through 2.0.4 does not sanitise or escape its "Paypal email address" setting before outputting it in the page, leading to an authenticated Stored Cross-Site Scripting issue
- Record
GHSA-7hv3-9hqr-c553- Weakness
- CWE-79
- Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-24478 is a medium vulnerability (CVSS 5.4) in Bookshelf Project Bookshelf, published August 2, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.62%, the 50th percentile. No source names a fixed version.