CVE Intelligence
Medium Cross-site scripting

CVE-2025-62320 — HTML Injection Leading to Data Exfiltration to External Server vulnerability affects HCL Unica Platform

HTML Injection can be carried out in Product when a web application does not properly check or clean user input before showing it on a webpage. Because of this, an attacker may insert unwanted HTML code into the page. When the browser loads the page, it may automatically interact with external resources included in that HTML, which can cause unexpected requests from the user’s browser.

Published Mar 17, 2026 · Updated Oct 13, 2026 · Sources: NIST National Vulnerability Database, CVE Program (cve.org) e CISA ADP · CNA: HCL

Who exploits it and how urgent it is

A 0–100 score combining confirmed exploitation, ransomware and APT use, public exploits, EPSS and severity.

No exploitation signal in the sources consulted so far.
How the score was calculated
  • EPSS 0.2% (30-day exploitation probability)+1
  • Technical severity (medium)+3

The score orders the patch queue; it does not replace your asset context (internet exposure, criticality, compensating controls).

Triage

Is it exploited, how likely is exploitation, what does it touch, and how severe do the sources call it.

Exploitation
Not confirmed
Not in CISA KEV — an absence of record, not proof it is unexploited.
EPSS FIRST
0.16%
ahead of 5% of scored CVEs · Oct 14, 2026
Affects
HCL
Sametime and 9 more
CVSS base
6.1
Medium · 3 source(s)

CISA SSVC assessment CISA

Three decision points CISA publishes for the CVEs it assesses (SSVC 2.0.3). A stakeholder decision, not a severity score.

Exploitation
None
none · proof-of-concept · active
Automatable
No
can an attacker script the kill-chain steps
Technical impact
Partial
partial · total control of the vulnerable component

Remediation

Fixes and mitigations documented by the sources — linked to the original advisory.

First 24 hours

Ordered from the record’s own fields — exposure first, because you cannot patch what you have not found. A rule-generated starting point.

  1. Identify exposed assets running the affected vendor/product/version combinations (HCL Sametime, Hcltech Unica, Hcltech Unica Audience Central…).
  2. The attack is network-based and needs no privileges: restrict exposure (ACLs, VPN, WAF) until patched.
  3. Apply the fixed version or the patch documented under Remediation.
  4. Exploitation requires user interaction: tighten email/web filtering and warn affected users.
  5. Search available logs for exploit probes matching the vulnerability class (cross-site scripting), errors and authentication anomalies.

Affected scope

Vendor, product and versions as the sources word them.

VendorProductVersionsStatusSource
HCL Sametime version version 25.1.1 and below. Vulnerable CVE Program (cve.org) e CISA ADP
Hcltech Unica ≥ 25.1.0 and < 25.1.1.0.1< 12.1.11 Vulnerable NIST National Vulnerability Database
Hcltech Unica Audience Central ≥ 25.1.0 and < 25.1.1.0.1< 12.1.11 Vulnerable NIST National Vulnerability Database
Hcltech Unica Campaign < 12.1.11≥ 25.1.0 and < 25.1.1.0.1 Vulnerable NIST National Vulnerability Database
Hcltech Unica Centralised Offer Management < 12.1.11≥ 25.1.0 and < 25.1.1.0.1 Vulnerable NIST National Vulnerability Database
Hcltech Unica Contact Central < 12.1.11≥ 25.1.0 and < 25.1.1.0.1 Vulnerable NIST National Vulnerability Database
Hcltech Unica Interact < 12.1.11≥ 25.1.0 and < 25.1.1.0.1 Vulnerable NIST National Vulnerability Database
Hcltech Unica Journey < 12.1.11≥ 25.1.0 and < 25.1.1.0.1 Vulnerable NIST National Vulnerability Database
Hcltech Unica Plan < 12.1.11≥ 25.1.0 and < 25.1.1.0.1 Vulnerable NIST National Vulnerability Database
Hcltech Unica Segment Central < 12.1.11≥ 25.1.0 and < 25.1.1.0.1 Vulnerable NIST National Vulnerability Database

Attack characteristics

The CVSS vector, decoded. It describes the attack, not your exposure to it.

Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
Required
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
None

Every base score collected

Sources score independently and may disagree; each row says who scored it and under which version.

ScoreVersionSeverityExpl.ImpactScored by
6.1 CVSS 3.1 Medium 2.8 2.7 nvd@nist.gov via NIST National Vulnerability Database
4.7 CVSS 3.1 Medium 2.8 1.4 psirt@hcl.com via NIST National Vulnerability Database
4.7 CVSS 3.1 Medium — — HCL via CVE Program (cve.org) e CISA ADP
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N (score shown at the top: nvd@nist.gov)
Scoring entities (NIST, CNA, ADP) score independently; each score is shown with its origin. For prioritization we use 6.1 (NVD (NIST)) as a conservative provisional reference — not a definitive official score.

Weakness MITRE

Weakness class according to MITRE’s CWE catalog.

CWE-79 · Cross-site Scripting (XSS)

Other CVEs with this weakness →

EPSS over time FIRST

Oct 13, 2026 → Oct 14, 2026 · 2 reading(s) · max 0.16%

Detection

Read off the CVSS vector and the weakness class. Starting points, not tested rules.

  • Prioritize edge telemetry for the network-reachable component (proxy, WAF, IDS/IPS).
  • Monitor CSP violation reports and script payloads in reflected parameters.
web/proxy/WAF logsnetwork IDS/IPSapplication logs

Timeline

What happened to this CVE, newest first.

  • 2026
  • Affected products added · hcl/sametime
    Oct 13, 2026 · CVE Program (cve.org) e CISA ADP
  • SSVC assessment updated
    Oct 13, 2026 · CVE Program (cve.org) e CISA ADP
  • Record published
    Oct 13, 2026
  • Fix documented
    Oct 13, 2026 · NIST National Vulnerability Database
  • CVSS changed · 6.1
    Oct 13, 2026 · NIST National Vulnerability Database
  • Source status changed · → Analyzed
    Oct 13, 2026 · NIST National Vulnerability Database
  • Record created in this database
    Oct 13, 2026 · NIST National Vulnerability Database
  • CVE published
    Mar 17, 2026 · HCL

Source activity

Repeated readings are counted rather than listed.

  • 1× Official description updated · Oct 13, 2026 – Oct 13, 2026

References

1 on the record

Elsewhere on this site

HCL
every CVE for this vendor
Cross-site scripting
same class
CWE-79
other pages naming this weakness

Related CVEs (same products)

  • CVE-2024-42210 HCL Unica Marketing Operations v12.1.8 and lower is affected by a Stored cross-site scripting (XSS) vulnerability Mar 19, 2026
  • CVE-2025-31966 Boolean-Based SQL Injection in Multiple Unica Components Mar 17, 2026
  • CVE-2025-62319 Boolean-Based SQL Injection in Multiple Unica Components Mar 16, 2026
  • CVE-2026-21791 HCL Sametime for Android is affected by sensitive information disclosure Mar 10, 2026
  • CVE-2025-51733 Cross-Site Request Forgery (CSRF) in Hcltech Unica Nov 28, 2025
  • CVE-2025-51734 Cross-site Scripting (XSS) in Hcltech Unica Nov 28, 2025

Not in any source we poll

Listed rather than left blank: an empty field and an unmeasured one look identical on screen, and only one is a reason to look elsewhere.

  • No confirmed IOCs, IP addresses, domains, file hashes, or malware artifacts supplied.
  • No organization-specific asset inventory, compensating-control status, or patch deployment evidence supplied.
  • No exploit packet captures, log samples, or incident case IDs supplied.

Answered from this record

Text assembled only from the fields above — no additional claims.

What should defenders know first?

CVE-2025-62320 is "HTML Injection Leading to Data Exfiltration to External Server vulnerability affects HCL Unica Platform", rated Medium. It affects Sametime (HCL); versions are in the scope table. It is not in CISA KEV, which does not rule out exploitation. CVSS 6.1 describes technical severity. EPSS 0.16% estimates the probability of exploitation in 30 days; neither replaces your asset context. First verify whether exposed or business-critical assets run the affected versions, apply vendor fixes or mitigations, and preserve logs for review.

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