CVE-2021-22873

MEDIUM
6.1
CVSS Score
Published: January 21, 2021 at 07:14 PM UTC
Updated: June 17, 2026 at 03:37 AM UTC
1 product affected across 1 vendorRevive Adserver

Using https://github.com/revive-adserver/revive-adserver by N/A?

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Severity
MEDIUM6.1
Exploit prediction
EPSS 70%

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 5.1.0
Vendor states this is fixed in 5.1.0 (unaffected)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

References (5)

Mailing Listx_refsource_FULLDISCBroken LinkThird Party Advisory
http://seclists.org/fulldisclosure/2021/Jan/60
x_refsource_MISCIssue TrackingThird Party Advisory
https://github.com/revive-adserver/revive-adserver/issues/1068
x_refsource_MISCExploitThird Party Advisory
https://hackerone.com/reports/1081406

CVSS

Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality
LOW
Integrity
LOW
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-601

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