Registered Envelope ServiceApplication · Cisco
CVE-2017-12321
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 · uneditedMultiple vulnerabilities in the web interface of the Cisco Registered Envelope Service (a cloud-based service) could allow an unauthenticated, remote attacker to conduct a cross-site scripting (XSS) attack or redirect a user of the affected service to an undesired web page. The vulnerabilities are due to insufficient validation of user-supplied input by the web-based management interface of the affected service. An attacker could exploit these vulnerabilities by persuading a user to click a malicious link or by sending an HTTP request that could cause the affected service to redirect the request to a specified malicious URL. A successful exploit could allow the attacker to execute arbitrary script code in the context of the web interface of the affected system or allow the attacker to access sensitive browser-based information on the affected system. These types of exploits could also be used in phishing attacks that send users to malicious websites without their knowledge. Cisco Bug IDs: CSCve77195, CSCve90978, CSCvf42310, CSCvf42703, CSCvf42723, CSCvf46169, CSCvf49999.
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 confidenceMultiple XSS and open redirect vulnerabilities in the Cisco Registered Envelope Service web interface allow unauthenticated remote attackers to execute arbitrary script code in the context of the affected web interface or redirect users to malicious websites through insufficient input validation.
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
Registered Envelope ServiceApplication
all versionsCVSS 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
- Network
- Complexity
- Low
- Privileges
- None
- User interaction
- Required
- Scope
- Changed
- Confidentiality
- Low
- Integrity
- Low
- Availability
- None
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
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.
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Identify Cisco Registered Envelope Service usageAudit your organization's use of Cisco email and collaboration services. Search email logs, SaaS subscriptions, and procurement records for 'Cisco Registered Envelope Service', 'Cisco CRES', or 'Cisco Secure Email' references.Affected if Your organization has an active or past subscription to Cisco Registered Envelope Service for email envelope processing.
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Check web interface accessibilityAttempt to access the Cisco Registered Envelope Service portal. The typical URL pattern is something like *.cres.ironport.com or *.registered-envelope.com. Verify if the service responds.Affected if The Cisco Registered Envelope Service web interface is reachable from your network without additional authentication beyond what your organization uses.
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Review email headers for envelope linksInspect incoming email headers from Cisco envelope notifications. Look for URLs pointing to cisco.com, ironport.com, or registered-envelope domains that may contain unsanitized parameters.Affected if Email headers contain links to Cisco envelope service URLs with suspicious-looking query parameters or paths.
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Monitor for user click-through to envelope URLsReview web proxy, firewall, or email gateway logs for user requests to known Cisco envelope service domains. Look for unusual or malformed URL patterns.Affected if Users have accessed the Cisco Registered Envelope Service portal and there are indicators of potential XSS or open redirect manipulation in the request URLs.
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Check for anomalous user reportsSurvey users for complaints about unexpected browser behavior, redirected pages, or suspicious prompts after clicking envelope links in email notifications.Affected if Users report being redirected to unexpected websites or experiencing script execution issues after using the Cisco envelope service.
An organization is affected if it actively uses the Cisco Registered Envelope Service web interface, as all versions of this cloud-based SaaS product are vulnerable to XSS and open redirect attacks.
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.
From vendor dataAs this is a Cisco cloud-based SaaS service, remediation depends on Cisco's patch release; organizations should monitor for updates and consider restricting use until patches are applied, while users should be warned about clicking untrusted links.
Fix this in Registered Envelope Service
Scoped from the published advisory
- Consultation1.0 h
- Testing1.0 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 $1,200.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2017-12321 — 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-2017-12321 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
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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
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