CVE-2021-43778

CRITICALNVD 9.19.1—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.1 under NVD CVSS v3. EPSS exploit probability: 52.7%, top 1% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
Elevated
9.1EG
EchelonGraph verdictPatch this weekExploitation is likely or a public exploit exists.
  • High exploitation likelihood — EPSS 53%
CISA-KEV: Not listedEPSS PROB: 53%CVSS: 9.1Exploit: Elevated riskExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

Barcode is a GLPI plugin for printing barcodes and QR codes. GLPI instances version 2.x prior to version 2.6.1 with the barcode plugin installed are vulnerable to a path traversal vulnerability. This issue was patched in version 2.6.1. As a workaround, delete the front/send.php file.

CVSS v3
9.1
EG Score
9.1(medium)
EG Risk
67(Track*)
EG Risk 67/100SSVC: Track*

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity91% × 45%
Exploitation53% × 40%
Automatability30% × 15%
Action: Watch closely — could escalate to Attend.
EPSS PROB
53%
EPSS %ILE
99%
KEV
Not listed

Published

November 24, 2021

Last Modified

September 8, 2025

Advisory Details (4)

Auto-updated Aug 1, 2026
Patch available. Sources: github_commit, github_release, github.
github Patch Available

Path traversal in GLPI barcode plugin · Advisory · pluginsGLPI/barcode · GitHub

https://github.com/pluginsGLPI/barcode/security/advisories/GHSA-2pjh-h828-wcw9
github_release Patch Available

2.6.1

Patch available: pluginsGLPI/barcode 2.6.1

https://github.com/pluginsGLPI/barcode/releases/tag/2.6.1
github_commit Patch Available

commit 428c3d9adfb4 (pluginsGLPI/barcode)

Patch available: pluginsGLPI/barcode 2.6.1 (contains commit 428c3d9adfb4)

https://github.com/pluginsGLPI/barcode/commit/428c3d9adfb446e8492b1c2b7affb3d34072ff46
generic

CVE-portfolio/CVE-2021-43778 at main · hansmach1ne/CVE-portfolio · GitHub

https://github.com/hansmach1ne/CVE-portfolio/tree/main/CVE-2021-43778

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 6× in last 7d / 29× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 105 total refreshes for this CVE.

  1. 2026-09-07 15:58 UTCEPSS rescore
  2. 2026-09-06 13:45 UTCEPSS rescore
  3. 2026-09-06 02:30 UTCOSV refresh
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  48. 2026-06-28 04:54 UTCEPSS rescore
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  72. 2026-06-10 22:16 UTCEPSS rescore
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  74. 2026-06-10 13:20 UTCEPSS rescore
  75. 2026-06-08 14:15 UTCEPSS rescore

Publicly available exploits

(2 references)

Working exploit code is in the public domain (1 GitHub PoC). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • GitHub PoCAK-blank/CVE-2021-43778
    First seen Nov 30, 2021

    CVE-2021-43778 poc

    Open source ↗
  • Nucleihttp/cves/2021/CVE-2021-43778.yaml
    First seen Jan 1, 2021

    GLPI plugin Barcode < 2.6.1 - Path Traversal Vulnerability.

    Open source ↗

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2021-43778?
CVE-2021-43778 is a critical vulnerability published on November 24, 2021. Barcode is a GLPI plugin for printing barcodes and QR codes. GLPI instances version 2.x prior to version 2.6.1 with the barcode plugin installed are vulnerable to a path traversal vulnerability. This issue was patched in version 2.6.1. As a workaround, delete the front/send.php file.
When was CVE-2021-43778 disclosed?
CVE-2021-43778 was first published in the National Vulnerability Database on November 24, 2021, with the most recent update on September 8, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2021-43778 actively exploited?
CVE-2021-43778 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 53% probability of exploitation in the next 30 days, which ranks it in the top 1.1% of all scored CVEs.
What is the CVSS score of CVE-2021-43778?
CVE-2021-43778 has a CVSS v3 base score of 9.1 (NVD).
How do I remediate CVE-2021-43778?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-43778, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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