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CVE Record

CVE-2026-4331: Blog2Social: Social Media Auto Post & Scheduler <= 8.8.2 - Missing Authorization to Authenticated (Subscriber+) Arbitrary Post Meta Deletion via 'b2s_reset_social_meta_tags' AJAX Action

The Blog2Social: Social Media Auto Post & Scheduler plugin for WordPress is vulnerable to unauthorized data loss in all versions up to, and including, 8.8.2. This is due to the resetSocialMetaTags() function only verifying that the user has the 'read' capability and a valid b2s_security_nonce, both of which are available to Subscriber-level users, as the plugin grants 'blog2social_access' capability to all roles upon activation, allowing them to access the plugin's admin pages where the nonce is output. This makes it possible for authenticated attackers, with Subscriber-level access and above, to delete all _b2s_post_meta records from the wp_postmeta table, permanently removing all custom social media meta tags for every post on the site.

MediumCVSS 4.3Not KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

A flaw in the Blog2Social WordPress plugin can let any logged-in user, even a Subscriber, delete Blog2Social social media metadata across the site. This can disrupt social sharing previews and campaign metadata but does not appear to expose data or allow full site takeover.

Executive priority

Handle in the normal vulnerability remediation cycle, faster for sites with many low-privilege users. The business risk is content and marketing metadata disruption, not confirmed system compromise.

Technical view

CVE-2026-4331 is a missing authorization issue in Blog2Social through 8.8.2. The AJAX action b2s_reset_social_meta_tags checks only read capability and a nonce available from plugin admin pages, enabling Subscriber+ users to delete all _b2s_post_meta records from wp_postmeta.

Likely exposure

WordPress sites running Blog2Social: Social Media Auto Post & Scheduler version 8.8.2 or earlier, especially sites allowing subscriber accounts or public registration.

Exploitation context

The issue requires authentication as Subscriber or higher. Sources do not show CISA KEV listing or active exploitation. Impact is integrity loss: removal of custom social media meta tags for every post.

Researcher notes

The public description identifies CWE-862 and CVSS 4.3. References point to vulnerable authorization checks in 8.8.2 and an 8.8.3 source reference, but public evidence provided does not include active exploitation.

Mitigation direction

  • Update Blog2Social to a version newer than 8.8.2 after reviewing vendor guidance.
  • Restrict untrusted user registration until the plugin is updated.
  • Limit plugin admin page access to trusted roles where possible.
  • Ensure recent database backups are available before remediation.

Validation and detection

  • Inventory WordPress sites for Blog2Social installations and versions.
  • Confirm whether any site runs version 8.8.2 or earlier.
  • Review logs for b2s_reset_social_meta_tags use by non-administrators.
  • Check whether _b2s_post_meta records were unexpectedly removed.
  • Verify backups can restore affected post metadata if needed.
Prepared
Confidence
high
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-862: Authorization and privilege behavior lookup

Authorization weaknesses can support privilege escalation and valid-account review, depending on exploit path. 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-2026-4331 mapping review

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Vulnerability profileCVE Program record
Severity
Medium
CVSS
4.3 (3.1)
Known Exploited
No
Published

Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/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
7Source 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
4.3CVSS 3.1MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N2.81.4Primary CVE score

Vulnerability scoring details

Base CVSS 3.1 score

4.3Medium
CVSS 3.1 vector shape for CVE-2026-4331Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/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
pr-gatewayBlog2Social: Social Media Auto Post & Scheduler0unaffected
Weakness

CWE details

CWE-862

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

CWE-862 · source CWE mapping

Missing Authorization

Missing Authorization represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.

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