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CriticalVulnerabilityCVE-2026-104350updated 27 Oct 2026, 20:35 UTC

Adobe Campaign Classic: reflected cross-site scripting flaw

A malicious link could trick a logged-in user into running hidden code in Adobe Campaign Classic, which could let an attacker take over that user's session. The attack needs the victim to click a crafted link or visit a compromised page.

Official, 2 sources
SeverityCriticalCVSS 9.3 of 10
Being exploited?UnclearNo reports either way yet
Fix available?UnclearNo fixed version published in the sources yet
How sure is this?Official, 2 sourcesBacked by an official source

How the attack works simplified

  1. 1Attacker crafts URLMalicious script embedded in link parameters
  2. 2Victim receives linkSent via email or planted on a web page
  3. 3Victim clicks linkUser is logged into Campaign Classic
  4. 4Script reflected in pageACC echoes the input without sanitizing it
  5. 5Session compromisedScript runs with user's privileges
  6. ResultAttacker gains control of user session

What happened

Adobe Campaign Classic (ACC) has a reflected cross-site scripting (XSS) vulnerability, where attacker-supplied input is echoed back into a web page without proper sanitization. The advisory rates it critical (CVSS 9.3) with a changed scope.

Why it is dangerous: An attacker who gets a victim to open a crafted URL could gain elevated access or control over that user's account or session, potentially affecting marketing data and campaign operations.

Are you affected?

You are affected if you run Adobe Campaign Classic (ACC) with a web interface that users access through a browser.

Adobe Campaign Classic (ACC) - specific versions not stated in the provided material.

What to do

  1. Check Adobe's security bulletin for ACC and install the fixed version as soon as it is available
  2. Warn users not to click unexpected links that open Campaign Classic pages
  3. Restrict access to ACC web interfaces to trusted networks where possible

Timeline

  1. 27 Oct 2026, 17:16 UTC
    Publicly disclosed
  2. 27 Oct 2026, 17:16 UTC
    Reported by NVD · NVD
  3. 27 Oct 2026, 17:20 UTC
    Picked up by Zero Radar
  4. 27 Oct 2026, 20:35 UTC
    GitHub Advisory reported on it · GitHub Advisory

Sources 2 reports, oldest first

Official vendor, government CERT or advisory database

Technical details

ID
CVE-2026-104350 · GHSA-mcf8-5pc2-3wxx
CVSS
9.3 / 10
EPSS
0.6% chance of exploitation within 30 days
Disclosed
27 Oct 2026, 17:16 UTC
On Zero Radar
27 Oct 2026, 17:20 UTC (4 min after disclosure)
Last change
27 Oct 2026, 20:35 UTC

The plain-language parts and the attack diagram were written by an AI model (anthropic/claude-haiku-5.5) from the sources above. Facts like versions, exploitation and dates come from the sources themselves. How Zero Radar works

Adobe Campaign Classic: reflected cross-site scripting flaw · Zero Radar