CVE-2026-34915Network attack vector

Reflected XSS via unsanitized clientid parameter

Published Jun 23, 2026 · Updated Jun 23, 2026

Reflected XSS in zone-include.php in Revive Adserver 6.0.6 and earlier allows remote attackers to execute script via clientid. The script returns the clientid parameter in an HTML response without context-appropriate escaping, allowing crafted markup to reach the browser. A remote attacker must cause a user to load the crafted request, after which the payload executes in the affected origin.

CVSS severity6.1
Medium
EPSS probability0.26%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Reflected XSS in zone-include.php in Revive Adserver 6.0.6 and earlier allows remote attackers to execute script via clientid. The script returns the clientid parameter in an HTML response without context-appropriate escaping, allowing crafted markup to reach the browser. A remote attacker must cause a user to load the crafted request, after which the payload executes in the affected origin.

The record

CVE
CVE-2026-34915
Published
Jun 23, 2026
Updated
Jun 23, 2026
Vendor
Revive Adserver Project
Product
Revive Adserver
Classifications
CWE-79, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 23, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 23, 2026Record 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=0 <=6.0.6

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Revive Adserver Project · Revive Adserverversion=0 <=6.0.6

Published CVSS scores

6.1HackerOneCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/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-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1203Exploitation for Client Execution

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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