CVSS 3.1
6.1 mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:NCVE-2021-22873
Medium (6.1) in revive-adserver revive adserver. EPSS 70% chance of exploitation in the next 30 days.
Revive Adserver before 5.1.0 is vulnerable to open redirects via the `dest`, `oadest`, and/or `ct0` parameters of the lg.php and ck.php delivery scripts. Such open redirects had previously been available by design to allow third party ad servers to track such metrics when delivering ads. However, third party click tracking via redirects is not a viable option anymore, leading to such open redirect functionality being removed and reclassified as a vulnerability.
Severity
- EPSS
- 70% chance of exploitation in the next 30 days; higher than 99% of CVEs (scores of 2026-10-31)
- CWE
- CWE-601
- Published
- Modified
- Record from
- the NVD, synced
Affected
- revive-adserver:revive_adserver
References
- http://packetstormsecurity.com/files/161070/Revive-Adserver-5.0.5-Cross-Site-Scripting-Open-Redirect.html
- http://seclists.org/fulldisclosure/2021/Jan/60
- https://github.com/revive-adserver/revive-adserver/issues/1068
- https://hackerone.com/reports/1081406
- https://www.revive-adserver.com/security/revive-sa-2021-001/