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CVE Record

CVE-2022-3861: Betheme <= 26.5.1.4 - Authenticated (Subscriber+) PHP Object Injection

The Betheme theme for WordPress is vulnerable to PHP Object Injection in versions up to, and including, 26.5.1.4 via deserialization of untrusted input supplied via the import, mfn-items-import-page, and mfn-items-import parameters passed through the mfn_builder_import, mfn_builder_import_page, importdata, importsinglepage, and importfromclipboard functions. This makes it possible for authenticated attackers, with subscriber level permissions and above to inject a PHP Object. The additional presence of a POP chain would make it possible for attackers to execute code, retrieve sensitive data, delete files, etc..

HighCVSS 8.8Not KEV-listedUpdated
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Glexia's TakeAutomated analysishigh

Security readout for executives and security teams

Plain-English summary

Betheme for WordPress had a high-risk flaw allowing any authenticated subscriber-level user to submit unsafe serialized data. If a suitable object chain exists in the site’s code, that could lead to code execution, data theft, or file deletion. Evidence does not show CISA KEV listing or active exploitation.

Executive priority

Treat as high priority for public WordPress properties using Betheme. The required privilege is low, so sites with customer, community, or open registration accounts should be reviewed first. Prioritize inventory, update guidance, and account exposure reduction.

Technical view

CVE-2022-3861 is CWE-502 PHP object injection in Betheme up to 26.5.1.4. Untrusted input reaches deserialization through builder import-related parameters and functions. The CVSS 3.1 score is 8.8, requiring network access and low privileges, with high confidentiality, integrity, and availability impact.

Likely exposure

Internet-facing WordPress sites running Betheme version 26.5.1.4 or earlier are the primary exposure, especially where untrusted users can authenticate as subscribers. The source bundle’s affected-version metadata is incomplete, so validate against vendor and Wordfence records.

Exploitation context

The vulnerability requires an authenticated user with subscriber-level permissions or higher. The source bundle states severe outcomes require an additional POP chain. No provided source confirms active exploitation, and the CVE is not marked as KEV.

Researcher notes

Focus review on unsafe deserialization in builder import paths named by the CVE: import, mfn-items-import-page, and mfn-items-import flowing through related import functions. Impact depends on available gadget or POP chains, so site-specific plugin and theme composition matters.

Mitigation direction

  • Identify all WordPress sites using MuffinGroup Betheme.
  • Update Betheme according to MuffinGroup and Wordfence guidance.
  • Remove unnecessary subscriber or higher-privilege accounts.
  • Disable open user registration where business use does not require it.
  • Review vendor advisories before assuming a specific fixed version.

Validation and detection

  • Check installed Betheme versions against 26.5.1.4 or earlier.
  • Confirm whether untrusted users can authenticate to affected sites.
  • Review logs for unusual builder import activity by low-privilege users.
  • Verify remediation by confirming the updated theme version.
  • Document any exposed sites requiring compensating controls.
Prepared
Confidence
medium
Sources
6

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-502: Code execution behavior lookup

Code execution and unsafe deserialization weaknesses often justify reviewing execution behavior and process telemetry. 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-2022-3861 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
High
CVSS
8.8 (3.1)
Known Exploited
No
Published

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

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
5Source 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
8.8CVSS 3.1HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H2.85.9Primary CVE score

Vulnerability scoring details

Base CVSS 3.1 score

8.8High
CVSS 3.1 vector shape for CVE-2022-3861Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

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

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
MuffinGroupBetheme0unaffected
Weakness

CWE details

CWE-502

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

CWE-502 · source CWE mapping

Deserialization of Untrusted Data

Deserialization of Untrusted Data represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.

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