CVE-2021-22871

Revive Adserver before 5.1.0 permits any user with a manager account to store possibly malicious...

4.8 Medium

Revive Adserver before 5.1.0 permits any user with a manager account to store possibly malicious content in the URL website property, which is then displayed unsanitized in the affiliate-preview.php tag generation screen, leading to a persistent cross-site scripting (XSS) vulnerability.

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

2.15%Up 0.6 points since Apr 14, 2021

What each source reports

NVD Score used 4.8

Record: CVE-2021-22871
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

Record: CVE-2021-22871
Weakness: CWE-79
Updated: 2026-11-02

EUVDEUVD-2021-10006 No score

Record: EUVD-2021-10006
Updated: 2026-11-03

GitHub AdvisoriesGHSA-m98h-4pjr-7pxh No score

Revive Adserver before 5.1.0 permits any user with a manager account to store possibly malicious...

Record: GHSA-m98h-4pjr-7pxh
Weakness: CWE-79
Updated: 2026-11-02

OSV 4.8

Record: CVE-2021-22871
CVSS 3.1: 4.8 MediumCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
Updated: 2026-11-02

Affected products

revive-adserver revive adserver

History

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

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

In short

CVE-2021-22871 is a medium vulnerability (CVSS 4.8) in Revive-adserver Revive Adserver, published January 21, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 2.15%, the 82nd percentile. No source names a fixed version.