CVE-2021-24426

Backup by 10Web <= 1.0.20 - Reflected Cross-Site Scripting (XSS)

4.8 Medium

The Backup by 10Web – Backup and Restore Plugin WordPress plugin through 1.0.20 does not sanitise or escape the tab parameter before outputting it back in the page, leading to a reflected Cross-Site Scripting issue

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: High
User interaction: Required

What an attacker can affect

Confidentiality: Low
Integrity: Low
Availability: None

Exploit likelihood

0.63%Unchanged since Jul 13, 2021

What each source reports

NVD Score used 4.8

Record: CVE-2021-24426
CVSS 3.1: 4.8 MediumCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
CVSS 2.0: 3.5 LowAV:N/AC:M/Au:S/C:N/I:P/A:N
Weakness: CWE-79
Updated: 2026-11-02

CVE List No score

Backup by 10Web <= 1.0.20 - Reflected Cross-Site Scripting (XSS)

Record: CVE-2021-24426
Weakness: CWE-79
Updated: 2026-11-02

EUVDEUVD-2021-11338 No score

Record: EUVD-2021-11338
Updated: 2026-11-03

GitHub AdvisoriesGHSA-mjc2-j72w-9227 4.8

The Backup by 10Web â€“ Backup and Restore Plugin WordPress plugin through 1.0.20 does not...

The Backup by 10Web â€“ Backup and Restore Plugin WordPress plugin through 1.0.20 does not sanitise or escape the tab parameter before outputting it back in the page, leading to a reflected Cross-Site Scripting issue

Record: GHSA-mjc2-j72w-9227
CVSS 3.1: 4.8 MediumCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
Weakness: CWE-79
Updated: 2026-11-02

Affected products

History

History
Recorded	Changed	Sources
Nov 3, 2026	aliases	EUVD
Nov 2, 2026	first indexed	CVE List, GitHub Advisories, NVD

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2021-24426 is a medium vulnerability (CVSS 4.8) in Unknown Backup By 10web – Backup And Restore Plugin, published July 12, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.63%, the 50th percentile. No source names a fixed version.