Joomla Extension - tassos.gr - Client-controlled validation bypass in Convert Forms extension < 5.2.5 (CVE-2026-77026) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-77026

Joomla Extension - tassos.gr - Client-controlled validation bypass in Convert Forms extension < 5.2.5

Answer in brief

CVE-2026-77026 records a Unknown severity vulnerability in Joomla Extension - tassos.gr - Client-controlled validation bypass in Convert Forms extension < 5.2.5. The current sources do not mark it as known exploited. The current feed maps tassos.gr/Convert Forms 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 20, 2026Updated Aug 20, 2026Source checked Aug 20, 2026First seen by HOL Aug 20, 2026Material review Aug 20, 2026

Upstream Advisory

Key facts

Risk: Unknown severitySource severity not reported
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Not reported

Why this deserves its current priority

A CVSS score is not reported in the current record. 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 tassos.gr/Convert Forms extension for Joomla (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
tassos.gr/Convert Forms extension for Joomlageneric	1.0.0-5.2.5	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for tassos.gr/Convert Forms extension for Joomla.
Review the reported fix. Monitor this advisory for an available fix and review any installs of the affected package.

Evidence timeline and material changes

Published upstream
Aug 20, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Aug 20, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Aug 20, 2026

Sources and claim methodology

Source referencetassos.gr

Upstream source description

Joomla Extension - tassos.gr - Client-controlled validation bypass in Convert Forms extension < 5.2.5 - The front-end Submissions view did not enforce access control. An unauthenticated visitor could therefore list a form's submissions.

Quoted source text, attributed separately from HOL analysis.