Vulnerability Description
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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Revive-Adserver | Revive Adserver | < 5.1.0 |
Related Weaknesses (CWE)
References
- http://packetstormsecurity.com/files/161070/Revive-Adserver-5.0.5-Cross-Site-ScrThird Party AdvisoryVDB Entry
- http://seclists.org/fulldisclosure/2021/Jan/60Broken LinkMailing ListThird Party Advisory
- https://github.com/revive-adserver/revive-adserver/issues/1068Issue TrackingThird Party Advisory
- https://hackerone.com/reports/1081406ExploitThird 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-ScrThird Party AdvisoryVDB Entry
- http://seclists.org/fulldisclosure/2021/Jan/60Broken LinkMailing ListThird Party Advisory
- https://github.com/revive-adserver/revive-adserver/issues/1068Issue TrackingThird Party Advisory
- https://hackerone.com/reports/1081406ExploitThird Party Advisory
- https://www.revive-adserver.com/security/revive-sa-2021-001/Vendor Advisory
FAQ
What is CVE-2021-22873?
CVE-2021-22873 is a vulnerability with a CVSS score of 6.1 (MEDIUM). 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 availa...
How severe is CVE-2021-22873?
CVE-2021-22873 has been rated MEDIUM with a CVSS base score of 6.1/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-22873?
Check the references section above for vendor advisories and patch information. Affected products include: Revive-Adserver Revive Adserver.