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CVE Record

CVE-2026-7429: SSCMS v7.4.0 Reflected Cross-Site Scripting via STL Processing

SSCMS v7.4.0 contains a reflected cross-site scripting vulnerability in the STL processing endpoint that allows attackers to execute arbitrary JavaScript by crafting malicious STL template payloads that are decrypted and returned without proper sanitization. Attackers can exploit improper output encoding in the /api/stl/actions/dynamic endpoint to inject executable JavaScript into JSON responses, leading to session hijacking, phishing attacks, and unauthorized actions performed on behalf of users.

MediumCVSS 4.6Not KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

SSCMS 7.4.0 can return attacker-controlled script through its dynamic STL endpoint without adequate sanitization. Exploitation requires low-privileged access and user interaction, but a successful attack could expose session information, enable phishing, or perform actions as the victim. The supplied sources do not identify a patched version.

Executive priority

Schedule prompt remediation for internet-facing or broadly accessible SSCMS 7.4.0 systems. This is not supported as an emergency, actively exploited issue, but user-session and integrity risks justify near-term action. Prioritize systems handling sensitive administrative sessions and track vendor guidance because the supplied sources do not name a fixed version.

Technical view

CVE-2026-7429 is reflected cross-site scripting, classified as CWE-79, in /api/stl/actions/dynamic. Crafted STL template content may be decrypted and included in JSON responses without proper output encoding. CVSS 3.1 is 4.6: network-accessible, low complexity, low privileges required, user interaction required, with limited confidentiality and integrity impact.

Likely exposure

Exposure is supported only for SSCMS 7.4.0. Risk depends on whether the affected endpoint is reachable, whether an attacker can obtain the required low-privileged access, and whether a user can be induced to process the malicious response. Other versions and default deployment exposure are not established by the supplied evidence.

Exploitation context

No active exploitation is established: CVE-2026-7429 is not listed as KEV in the supplied bundle. The described scenario requires a crafted STL payload, low privileges, and victim interaction. Potential consequences include session compromise, phishing, and unauthorized actions, but the sources provide no campaign, prevalence, or confirmed exploitation evidence.

Researcher notes

The CVSS vector is AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N. Validate response content type, browser execution context, authentication requirements, and affected role permissions without exposing users. The bundle attributes execution to unsanitized decrypted STL content returned in JSON, but it does not document patch commits, fixed versions, affected configurations, or exploitation telemetry.

Mitigation direction

  • Identify and prioritize SSCMS 7.4.0 installations.
  • Check vendor guidance for a patched release or official mitigation.
  • Restrict access to the affected endpoint where operationally feasible.
  • Limit low-privileged accounts and review unnecessary access.
  • Apply contextual output encoding or sanitization if maintaining custom code.

Validation and detection

  • Confirm deployed SSCMS versions using reliable inventory records.
  • Determine whether /api/stl/actions/dynamic is externally reachable.
  • Verify the endpoint requires authentication and review authorized roles.
  • Review relevant request logs for suspicious STL-processing activity.
  • Confirm vendor-recommended remediation after applying updates or controls.
Prepared
Confidence
medium
Sources
5

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.

cwe · medium confidence lookup

CWE-79: User-session and phishing behavior lookup

Client-side and session-facing weaknesses should be reviewed alongside initial-access and user-execution behaviors. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.

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cve · low confidence lookup

CVE-2026-7429 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

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Vulnerability profileCVE Program record
Severity
Medium
CVSS
4.6 (3.1)
Known Exploited
No
Published

Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

2CVSS vectors
3Timeline events
1ADP providers
4Source links

SSVC decision data

CISA-ADPCISA Coordinator
Timestamp
Version
2.0.3
Exploitation: pocAutomatable: noTechnical Impact: partial

CVSS vector scores

2 official scores

We collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.

ScoreVersionSeverityVectorExploitImpactSource
4.6CVSS 3.1MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N2.12.5VulnCheck
2.1CVSS 4.0LowCVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:P/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N——VulnCheck

Vulnerability scoring details

Base CVSS 4.0 score

2.1Low
CVSS 4.0 vector shape for CVE-2026-7429Attack VectorAttack ComplexityAttack RequirementsPrivileges RequiredUser InteractionVS ConfidentialityVS IntegrityVS AvailabilitySS ConfidentialitySS IntegritySS Availability

Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:P/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Attack Requirements
NonePresent
Privileges Required
NoneLowHigh
User Interaction
NonePassiveActive
VS Confidentiality
HighLowNone
VS Integrity
HighLowNone
VS Availability
HighLowNone
SS Confidentiality
HighLowNone
SS Integrity
HighLowNone
SS Availability
HighLowNone

Vulnerability timeline

Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.

  1. CVE reservedCVE Program

    The CVE ID was reserved by the assigning CNA.

  2. CVE publishedCVE Program

    The CVE record was published.

  3. CVE updatedCVE Program

    The CVE record metadata indicates this as the latest update time.

ADP provider summaries

CISA-ADPCISA ADP Vulnrichment
other:ssvc

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
siteserverSSCMS7.4.0unknown
Weakness

CWE details

CWE-79

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.

CWE-79 · source CWE mapping

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

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.

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