CVE-2023-21596
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedAdobe InCopy versions 18.0 (and earlier), 17.4 (and earlier) are affected by an Improper Input Validation vulnerability that could result in arbitrary code execution in the context of the current user. Exploitation of this issue requires user interaction in that a victim must open a malicious file.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · high confidenceAdobe InCopy versions 18.0 and earlier and 17.4 and earlier contain an improper input validation vulnerability that allows arbitrary code execution when a user opens a malicious file. The vulnerability stems from the application's failure to properly validate input data during file parsing, enabling an attacker to inject and execute arbitrary code in the context of the current user's privileges.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.
NVD · CPE data>= 17.0, <= 17.4= 18.0CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Local
- Complexity
- Low
- Privileges
- None
- User interaction
- Required
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
-
Identify installed Adobe InCopy versionOpen Adobe InCopy and navigate to Help > About InCopy (Windows) or InCopy > About InCopy (Mac). Alternatively, on Windows check Programs and Features in Control Panel, or on Mac check Applications folder Get Info.Affected if The version displayed is 17.0 through 17.4, or exactly 18.0
-
Confirm the exact version numberNote the full version number shown (for example, 17.4 or 18.0). Adobe versions are typically displayed as major.minor (e.g., 17.4) or with a build number.Affected if The version is any release in the 17.0-17.4 range inclusive, or is exactly version 18.0
-
Verify the 17.x branch versionIf the version begins with 17, confirm it is not 17.4.1 or higher. Version 17.4.1 and later are patched.Affected if The installed 17.x version is 17.0, 17.1, 17.2, 17.3, or 17.4 (without the .1 patch)
-
Verify the 18.x branch versionIf the version begins with 18, confirm it is not 18.1 or higher. Version 18.1 and later are patched.Affected if The installed 18.x version is exactly 18.0
You are affected if Adobe InCopy is installed and its version is 17.0 through 17.4 (any minor release in that range) or exactly version 18.0.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
dbcve · scopedApply the appropriate Adobe security update (version 18.1 or later for the 18.x branch, or 17.4.1 or later for the 17.x branch) to remediate this vulnerability. Additionally, enforce user awareness to avoid opening untrusted InCopy files from unknown sources.
Adobe InCopy 18.1 or later (or 17.4.1 for the 17.x line)
- 1. Open Adobe InCopy
- 2. Go to Help menu
- 3. Select 'Check for Updates' or visit the Adobe official downloads page
- 4. Download and install the latest version of Adobe InCopy
- 5. Verify the installed version is 18.1 or later for the 18.x line, or 17.4.1 or later for the 17.x line
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation2.0 h
- Implementation1.0 h
- Testing2.0 h
- Review / QA1.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $1,696.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2023-21596 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2023-21596 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
Be the first to add a field note for this CVE — a mitigation you’ve verified, a version caveat, or a link to a working fix. Sign in above to contribute.
A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.
- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
- No weaponised exploit code, or anything meant to cause harm
- No spam, self-promotion, credentials, or personal data