maintenance-appendcode-check.php · Stored Cross-site Scripting Vulnerability
Source GCVE Database
Not known to be exploited · CVSS 5.4 Medium · fixed in 6.0.9 : update Adserver when convenient.
Data as of 11 Nov 2026, 19:38 UTC
Thin evidence
One scorer or none| CNA (hackerone) | CVSS 3.0 | 5.4 |
|---|
- Patch
- Available – fixed in 6.0.9
CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:NExploitation evidence
Disclosed: evidence found.
CVE published 11 Nov 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 11 Nov 2026.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| ReviveAdserver | Affected
| Fixed in– |
AI-suggested
Upgrade Revive Adserver to version 6.0.9 or later, where the vulnerability is fixed by HTML-encoding tracker names in the maintenance results. No other mitigation is indicated or required.
Description
Revive Adserver versions 6.0.8 and earlier contain a stored cross-site scripting (XSS) vulnerability in the maintenance-appendcode-check.php script. This flaw allows an authenticated manager to inject malicious JavaScript by storing a crafted tracker name that appears in the maintenance results page. When an administrator views this page, the injected script executes in their browser due to improper HTML encoding. The vulnerability is addressed in version 6.0.9 by properly encoding tracker names in the maintenance output.