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Back to active CVEs
Medium · CVSS 6.9CVE-2026-77034

Joomla Extension - joomlaeventmanager.net - Unauthenticated article overwrite and force-publish in Joomla Event Manager < 5.0.1CVE-2026-77034

Answer in brief

CVE-2026-77034 records a Medium severity (CVSS 6.9) vulnerability in Joomla Extension - joomlaeventmanager.net - Unauthenticated article overwrite and force-publish in Joomla Event Manager < 5.0.1. The current sources do not mark it as known exploited. The current feed maps joomlaeventmanager.net/JEM - Joomla Event Manager extension for Joomla (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Aug 27, 2026Updated Aug 28, 2026Source checked Oct 11, 2026First seen by HOL Aug 27, 2026Material review Aug 28, 2026
Upstream Advisory

Key facts

Risk
Medium · CVSS 6.9
Exploitation
Not marked as known exploited
Affected software
1 mapped package or product
Fix availability
Not reported

Why this deserves its current priority

CVSS is 6.9. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps joomlaeventmanager.net/JEM - Joomla Event Manager extension for Joomla (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
joomlaeventmanager.net/JEM - Joomla Event Manager extension for Joomlageneric1.0.0-5.0.0Not reported

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for joomlaeventmanager.net/JEM - Joomla Event Manager extension for Joomla.
  2. 2Review the reported fix. Monitor this advisory for an available fix and review any installs of the affected package.

Evidence timeline and material changes

  1. Published upstream

    Aug 27, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Aug 28, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Aug 27, 2026

Sources and claim methodology

  • Source referencejoomlaeventmanager.net
Upstream source description

Joomla Extension - joomlaeventmanager.net - Unauthenticated article overwrite and force-publish in Joomla Event Manager < 5.0.1 - Any visitor holding their own session token can republish and overwrite an article associated with an event.

Quoted source text, attributed separately from HOL analysis.

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  • hyper-mcp through 0.8.3 OCI Plugin Signature Verification TOCTOU Race ConditionSame generic ecosystem
  • hyper-mcp through 0.8.3 Improper Signature Verification of OCI WebAssembly PluginsSame generic ecosystem
  • thClaws through 0.141.0 Symlink Following File Write via POST /v1/inputsSame generic ecosystem

Record context

Vulnerability class
Missing Auth
EPSS
Not reported
CWE IDs
CWE-284
Source
CVE List V5
Source checked
Oct 11, 2026
References
1 linked source
Open source record