CVE-2021-22873

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 v3.1

6.1 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

CVSS v2.0

5.8 MEDIUMAV:N/AC:M/Au:N/C:P/I:P/A:N

EPSS

69.56% chance of exploitation in the next 30 days, 99th percentile

Nuclei

medium · CWE-601

Published

2021-01-21

Updated

2024-08-03

Proof-of-concept exploits (1)

• K3ysTr0K3R/CVE-2021-22873-EXPLOIT2★ · 2023-08-09

Nuclei templates (1)

• projectdiscovery/nuclei-templates/blob/main/http/cves/2021/CVE-2021-22873.yaml

References

• CVE Record
• NVD entry

Related

• CVE-2021-22872
• CVE-2021-22880
• CVE-2021-22707
• CVE-2021-22881
• CVE-2021-22652
• CVE-2021-22893