Adobe Connect | Cross-site Scripting (Stored XSS) (CWE-79)
Affects Adobe Connect 12.12 and earlier on Windows, rated CVSS 9.6 critical. The checked facts list no fixed version.
Written by anthropic/claude-haiku-5.5 from the sources below. Verify against them.
- Exploited
- No known exploitation
- Fix
- No fix listed
- Who is exposed
- Specific setups only
Do first: Check whether your setup matches what the bug needs. Adobe Connect 12.12 and earlier on Windows
- Last modified
- Whether it needs action now or is a reference record, by fixed rules, with why. Last checked is when cve.now last re-read it.What do these mean? →
- Reference
- Last checked
- A 0-100 score for how much a CVE matters across the industry: exploitation, exposure, how widely the software is used, severity and whether a fix exists.What do these mean? →
- 23/100 · provisional
- How many real-world setups can hit the bug, from the vendor's advisory and CISA data. It does not know your setup.What do these mean? →
- Specific setups only
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
Summary
Adobe Connect contains a stored cross-site scripting flaw that lets a low-privileged attacker reached over the network inject malicious scripts into vulnerable form fields. When a victim opens the affected page, the script runs in their browser, potentially giving the attacker elevated access or control over the victim's account or session.
Read the original description
Adobe Connect is affected by a stored Cross-Site Scripting (XSS) vulnerability that could be abused by a low-privileged attacker to inject malicious scripts into vulnerable form fields. Malicious JavaScript may be executed in a victim's browser when they browse to the page containing the vulnerable field, potentially gaining elevated access or control over the victim's account or session. Scope is changed.
Who should check
Teams running Adobe Connect 12.12 and earlier on Windows
cve.now Index
- Exploitation?/40Unknown. No CISA SSVC exploitation rating yet
- Exposure8/25Specific setups only, reachable over the network
- Reach?/20Unknown. No tracked technology or package matched
- Severity9.6/10CVSS 9.6
- No patch5/5No patch listed yet
What would change the score
- Would score about 73 if added to CISA KEV
- Would score about 68 if CISA's SSVC rates exploitation active
- Would score about 30 if CISA's SSVC rates it automatable
What to do
Check whether your setup matches what the bug needs.
Adobe Connect 12.12 and earlier on WindowsWorkaround: The checked facts list no workaround or fix. Check Adobe's advisory for interim guidance on limiting the affected form fields or the Windows deployment.
Check your systems with an agent
Paste this into a coding or ops agent. It checks your systems read-only and reports a table per asset.
Check whether my systems are affected by CVE-2026-121904 (Adobe Connect | Cross-site Scripting (Stored XSS) (CWE-79)), using the cve.now data below. Rules: work read-only. Do not run exploit code, proof-of-concept scripts or scanners that send attack payloads, and do not change any configuration, package, image or deployment. Report findings only. What cve.now has for CVE-2026-121904 (entry last updated 2026-11-10): Affected: - Adobe Adobe Connect: through 12.8 - Adobe Adobe Connect: through 12.9 - Adobe Adobe Connect: through 12.10 - Adobe Adobe Connect: through 12.11 - Adobe Adobe Connect: through 12.12 Fixed versions: none listed yet. Conditions (all must be true for the bug to be hit): - Adobe Connect 12.12 and earlier on Windows (source: https://www.adobe.com/trust/security/products/connect/apsb26-191.html) Setup: unknown whether the bug needs a non-default feature or setting. Check the advisory. Attacker needs: network access, low-privilege login, no user action. CISA KEV: CVE-2026-121904 is not listed as of cve.now's last read. This KEV status is for CVE-2026-121904 only. If you also check another CVE, look up its own KEV status; never assume it from this one. How to check: - Installed software: check what is actually running, not what a repo declares. Read the version from each host, container image and Kubernetes node (the binary's version output, the OS package database, image layers), and check whether the conditions above hold there. Distribution packages may carry a backported fix under an older version number; confirm against the distribution's own advisory. Verify against the linked advisories before concluding, and cite the date you read each one: - https://www.adobe.com/trust/security/products/connect/apsb26-191.html Do not conclude an asset is unaffected unless you checked it and the evidence covers both its version and the conditions above. If you could not check something, mark it unknown and say what is missing. Report a table with one row per asset and these columns: Asset | Version or build | Status (affected, fixed, not applicable, unknown) | Compensating controls | Exposure (internet-facing, internal, none) | Evidence | Next action. Entry: https://cve.now/CVE-2026-121904 For follow-up questions, use the cve.now MCP server at https://mcp.cve.now/mcp (no authentication), for example get_vulnerability with id CVE-2026-121904.
Timeline
- CVE published
- First seen by cve.now
- Posted on X by cve.now
Affected versions
- Adobe Adobe Connect
through 12.8
- Adobe Adobe Connect
through 12.9
- Adobe Adobe Connect
through 12.10
- Adobe Adobe Connect
through 12.11
- Adobe Adobe Connect
through 12.12
Evidence 3
Vendor advisory · 1
Establishes: Affected and fixed versions.
- Advisory
CVE record · 2
Establishes: The identifier and description.
- Record
- Record
Corrections
None so far.
Something wrong on this page? Report an error. Every fix is listed here.
Questions about CVE-2026-121904
Is CVE-2026-121904 being exploited?
It is not in CISA's Known Exploited Vulnerabilities catalog, and CISA's SSVC assessment does not mark exploitation as active. That does not mean it has not been attacked: vendors and researchers can report attacks before CISA lists them. No public exploit code is tracked.Source: cve.now feed data
What does this mean?
The flaw is stored cross-site scripting in Adobe Connect form fields. The advisory's stated impact is privilege escalation of the attacker within Adobe Connect.Source: adobe.com
Which versions are affected by CVE-2026-121904?
Adobe Connect: through 12.8. Adobe Connect: through 12.9. Adobe Connect: through 12.10. Adobe Connect: through 12.11. Adobe Connect: through 12.12.Source: cve.now feed data
Am I affected, and how do I check?
Adobe Connect versions 12.12 and earlier are listed as affected, and the stated condition is Windows installs. To check, compare the installed Adobe Connect version with 12.12 and confirm whether the server runs on Windows.Source: adobe.com
How do I fix CVE-2026-121904?
The checked facts give no fixed version, so no upgrade target can be named from them. Check Adobe's advisory for a fixed build and install it when available.Source: adobe.com
What if there's no patch?
The checked facts list no workaround or fix. Check Adobe's advisory for interim guidance on limiting the affected form fields or the Windows deployment.Source: adobe.com