CVE-2025-62320Network attack vector

Browser data disclosure via injected external resources

Published Mar 17, 2026 · Updated Mar 17, 2026

HTML injection in HCL Sametime 25.1.1 and earlier allows remote attackers to trigger browser requests to external servers. HCL has not identified the affected page, parameter, or rendering function; it states only that unsanitized input is displayed as HTML. Exploitation requires a user to load the injected page, after which embedded external resources can disclose browser-request data; no integrity or availability effect is reported.

CVSS severity4.7
Medium
EPSS probability0.16%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

HTML injection in HCL Sametime 25.1.1 and earlier allows remote attackers to trigger browser requests to external servers. HCL has not identified the affected page, parameter, or rendering function; it states only that unsanitized input is displayed as HTML. Exploitation requires a user to load the injected page, after which embedded external resources can disclose browser-request data; no integrity or availability effect is reported.

The record

CVE
CVE-2025-62320
Published
Mar 17, 2026
Updated
Mar 17, 2026
Vendor
HCLSoftware
Product
HCL Sametime
Classifications
CWE-79
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 17, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 17, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=version 25.1.1 and below.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

HCLSoftware · HCL Sametimeversion=version 25.1.1 and below.

Published CVSS scores

6.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
4.7HCL SoftwareCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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