TI-2021-05734 Aliases CVE-2021-22873 GHSA-8rwp-72pf-cq9g

Open redirect in https://github.com/revive-adserver/revive-adserver

MEDIUM 64CWE-601Published 2021-01-21 · Updated 2024-08-03

Key facts

Attack vector: Network
Privileges required: None
User interaction: Required
Attack complexity: Low
Impact type: Spoofing
Confidentiality · integrity · availability: Low · Low · None
Fix status: No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-601.

Summary

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.

Why it matters now

EPSS 0.69561 99th percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by NVD

Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
—	https://github.com/revive-adserver/revive-adserver	Fixed in 5.1.0	—	No fix listed	CNA

https://github.com/revive-adserver/revive-adserver Vendor— Affected Fixed in 5.1.0 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:revive-adserver:revive_adserver::::::::	before 5.1.0	Vulnerable	Revive Adserver

cpe:2.3:a:revive-adserver:revive_adserver:*:*:*:*:*:*:*:* Versions before 5.1.0 Vulnerable ·Revive Adserver

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2021-22873
2026-10-03 Alias added: GHSA-8rwp-72pf-cq9g

References

Exploit 1

https://hackerone.com/reports/1081406

Advisory 4

TI-2025-31114 Improper access control in Revive Adserver CVSS 3.0HIGH 8.8
TI-2020-06561 Open redirect in https://github.com/revive-adserver/revive-adserver CVSS 3.1MEDIUM 6.1
TI-2025-32749 Missing authorization in Revive Adserver CVSS 3.1MEDIUM 6.5
TI-2025-34808 Improper neutralisation of input in Revive Adserver 6.0.0+ causes a reflected XSS attack in the banner-zone.php script. CVSS 3.0MEDIUM 6.1
TI-2025-32747 Cross-site scripting in Revive Adserver CVSS 3.1MEDIUM 5.4
TI-2025-31115 Cross-site scripting in Revive Adserver CVSS 3.1MEDIUM 6.1

See all 65 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences