CVE-2021-22871

Name: CVE-2021-22871
Creator: NVD / NIST
Published: 2021-01-26T18:16:19.02+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 4.8/10EPSS 2.12%

Last modified Jun 17, 2026

CVE-2021-22871 is a medium-severity vulnerability rated 4.8/10 on the CVSS scale. 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.. EPSS estimates a 2.12% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1

4.8/10

CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N

EPSS Probability

2.12%

79.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Revive-Adserver	Revive Adserver	< 5.1.0

References

http://packetstormsecurity.com/files/161070/Revive-Adserver-5.0.5-Cross-Site-Scripting-Open-Redirect.htmlThird Party Advisory, VDB Entry
http://seclists.org/fulldisclosure/2021/Jan/60Broken Link, Mailing List, Third Party Advisory
https://github.com/revive-adserver/revive-adserver/commit/62a2a0439Patch, Third Party Advisory
https://github.com/revive-adserver/revive-adserver/commit/89b88ce26Patch, Third Party Advisory
https://hackerone.com/reports/819362Exploit, Third Party Advisory
https://www.revive-adserver.com/security/revive-sa-2021-001/Vendor Advisory
http://packetstormsecurity.com/files/161070/Revive-Adserver-5.0.5-Cross-Site-Scripting-Open-Redirect.htmlThird Party Advisory, VDB Entry
http://seclists.org/fulldisclosure/2021/Jan/60Broken Link, Mailing List, Third Party Advisory
https://github.com/revive-adserver/revive-adserver/commit/62a2a0439Patch, Third Party Advisory
https://github.com/revive-adserver/revive-adserver/commit/89b88ce26Patch, Third Party Advisory
https://hackerone.com/reports/819362Exploit, Third Party Advisory
https://www.revive-adserver.com/security/revive-sa-2021-001/Vendor Advisory

Timeline

Published: Jan 26, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-22871?

How severe is CVE-2021-22871?

CVE-2021-22871 has a CVSS score of 4.8/10 (MEDIUM severity). The EPSS model estimates a 2.12% probability of exploitation in the next 30 days.

How do I fix CVE-2021-22871?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-22871?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST