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CVE Record

CVE-2023-2964: Simple Iframe < 1.2.0 - Contributor+ Stored XSS

The Simple Iframe WordPress plugin before 1.2.0 does not properly validate one of its WordPress block attribute's content, which may allow users whose role is at least that of a contributor to conduct Stored Cross-Site Scripting attacks.

MediumCVSS 5.4Not KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

CVE-2023-2964 is a stored cross-site scripting issue in the Simple Iframe WordPress plugin before 1.2.0. A contributor-level user could save malicious content in a block attribute, potentially affecting another user who views it. Business risk is moderate because exploitation needs an authenticated contributor and user interaction.

Executive priority

Prioritize routine remediation, faster for sites with many contributor accounts, public publishing workflows, or weak account controls. This is not described as actively exploited in the supplied evidence, but stored XSS can affect administrators and site visitors if left unpatched.

Technical view

The plugin fails to properly validate a WordPress block attribute, allowing stored XSS by users with at least contributor privileges. CVSS 3.1 is 5.4 with low attack complexity, low privileges required, user interaction required, changed scope, and limited confidentiality and integrity impact.

Likely exposure

Exposure is likely limited to WordPress sites running Simple Iframe before 1.2.0, especially where contributor accounts are available to many users or may be compromised. The supplied affected-product metadata is incomplete: vendor is unknown, CPEs are absent, and the structured version field is not useful.

Exploitation context

The bundle does not show CISA KEV listing or active exploitation. WPScan is tagged with exploit-related metadata, but the provided sources do not establish real-world exploitation. The practical attacker profile is an authenticated contributor or a compromised account with similar permissions.

Researcher notes

Evidence supports contributor-plus stored XSS in Simple Iframe before 1.2.0, CWE-79, CVSS 5.4. The record lacks CPEs and clear vendor metadata. Avoid assuming broader WordPress core exposure or unauthenticated exploitation from the supplied bundle.

Mitigation direction

  • Update Simple Iframe to version 1.2.0 or later where available.
  • Check WPScan or vendor guidance for current remediation details.
  • Limit contributor-level access to trusted users until patched.
  • Review and remove unused WordPress contributor accounts.
  • Consider disabling the plugin if it cannot be updated safely.

Validation and detection

  • Inventory WordPress sites for the Simple Iframe plugin.
  • Confirm installed plugin versions are 1.2.0 or later.
  • Review users with contributor-level or higher permissions.
  • Inspect recent contributor-created iframe blocks for suspicious content.
  • Check security monitoring for stored XSS alerts involving WordPress content.
Prepared
Confidence
high
Sources
3

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-2023-2964 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
5.4 (3.1)
Known Exploited
No
Published

Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/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.

1CVSS vectors
0Timeline events
0ADP providers
2Source links

CVSS vector scores

1 official score

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
5.4CVSS 3.1MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N2.32.7Primary CVE score

Vulnerability scoring details

Base CVSS 3.1 score

5.4Medium
CVSS 3.1 vector shape for CVE-2023-2964Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

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

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
UnknownSimple Iframe0unaffected
Weakness

CWE details

CWE-79

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