CVE-2020-8143Network attack vector

Unauthenticated redirect via returnurl parameter

Published Apr 3, 2020 · Updated Aug 4, 2024

Open redirect in Revive Adserver <=5.0.4 allows remote attackers to redirect logged-in users via crafted admin links. The /www/admin/*-modify.php endpoints skip CSRF validation when no meaningful parameter is supplied and then honor the returnurl GET parameter, sending the browser to an attacker-chosen destination. Exploitation requires a logged-in user to follow the crafted link; the request performs no administrative action but can facilitate phishing or trust-boundary bypass.

CVSS severity6.1
Medium
EPSS probability70.39%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Open redirect in Revive Adserver <=5.0.4 allows remote attackers to redirect logged-in users via crafted admin links. The /www/admin/*-modify.php endpoints skip CSRF validation when no meaningful parameter is supplied and then honor the returnurl GET parameter, sending the browser to an attacker-chosen destination. Exploitation requires a logged-in user to follow the crafted link; the request performs no administrative action but can facilitate phishing or trust-boundary bypass.

The record

CVE
CVE-2020-8143
Published
Apr 3, 2020
Updated
Aug 4, 2024
Vendor
Revive Adserver Project
Product
Revive Adserver
Classifications
CWE-601, T1204.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 3, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=Fixed in >= 5.0.5

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Revive Adserver Project · Revive Adserverversion=Fixed in >= 5.0.5

Published CVSS scores

6.1NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
4.2Revive Adserver ProjectCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-601URL Redirection to Untrusted Site ('Open Redirect')
T1204.001Malicious Link

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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