CVE-2019-11537

MEDIUMNVD 6.16.1—
EchelonGraph scoreMEDIUM confidence

Score 6.1 from GitHub Security Advisory published 2022-05-24. NVD baseline CVSS 6.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Weaponized
6.1EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 4.6%CVSS: 6.1Exploit: Exploit-DB (verified) · public exploitExposed services: Not assessed

A fix is available — apply it.

In osTicket before 1.12, XSS exists via /upload/file.php, /upload/scp/users.php?do=import-users, and /upload/scp/ajax.php/users/import if an agent manager user uploads a crafted .csv file to the User Importer, because file contents can appear in an error message. The XSS can lead to local file inclusion.

CVSS v3
6.1
EG Score
6.1MEDIUMmedium confidence
EG Risk
58
EG Risk 58/100CISA SSVC

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
Severity61% × 45%
Exploitation65% × 40%
Automatability30% × 15%
CISA SSVC: Track at low or medium mission impact; Track* or Attend at high (mission-essential systems).
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
4.6%
EPSS %ILE
91st
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Track* or Attend at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation public PoC (EG-KEV: weaponized) · Automatable unknown (not published for this CVE) · Technical impact partial (CVSS below 9.0). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

April 25, 2019

Last Modified

July 10, 2026

Advisory Details (5)

Auto-updated Jul 10, 2026
🔬 Proof of concept available. Patch available. Sources: github_pr, github_release.
generic🟡 PoC Available

osTicket 1.11 - Cross-Site Scripting / Local File Inclusion - PHP webapps Exploit

https://www.exploit-db.com/exploits/46753/
generic🟡 PoC Available

osTicket 1.11 - Cross-Site Scripting / Local File Inclusion - PHP webapps Exploit

https://www.exploit-db.com/exploits/46753
generic

Pentest Blog - Self-Improvement to Ethical Hacking

https://pentest.com.tr/exploits/osTicket-v1-11-XSS-to-LFI.html
github_release Patch Available

v1.12

Patch available: osTicket/osTicket v1.12

https://github.com/osTicket/osTicket/releases/tag/v1.12
github_pr Patch Available

xss: XSS To LFI Vulnerability

Patch available: osTicket/osTicket v1.15.4 (PR #4869 merged 2019-04-24)

https://github.com/osTicket/osTicket/pull/4869

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 7× in last 7d / 24× 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 161 total refreshes for this CVE.

  1. 2026-10-09 20:03 UTCEPSS rescore
  2. 2026-10-08 16:37 UTCEPSS rescore
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  9. 2026-09-30 10:09 UTCEG score recompute
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  11. 2026-09-28 08:02 UTCOSV refresh
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  1. 2026-09-08 12:04 UTCOSV refresh
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  29. 2026-08-06 04:54 UTCOSV refresh
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  43. 2026-07-23 14:15 UTCEPSS rescore
  44. 2026-07-23 01:39 UTCEG score recompute
  45. 2026-07-22 22:19 UTCEG score recompute
  46. 2026-07-22 14:05 UTCEPSS rescore
  47. 2026-07-21 15:22 UTCEPSS rescore
  48. 2026-07-21 15:22 UTCEPSS rescore
  49. 2026-07-20 17:32 UTCOSV refresh
  50. 2026-07-20 17:04 UTCEPSS rescore
  51. 2026-07-19 14:28 UTCEPSS rescore
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  73. 2026-07-02 16:56 UTCEPSS rescore
  74. 2026-07-01 15:03 UTCEPSS rescore
  75. 2026-07-01 15:03 UTCEPSS rescore

Publicly available exploits

(1 reference)

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

  • Exploit-DBEDB-46753✓ verified
    First seen Apr 25, 2019

    osTicket 1.11 - Cross-Site Scripting / Local File Inclusion

    Open source ↗

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2019-11537?
CVE-2019-11537 is a medium vulnerability published on April 25, 2019. In osTicket before 1.12, XSS exists via /upload/file.php, /upload/scp/users.php?do=import-users, and /upload/scp/ajax.php/users/import if an agent manager user uploads a crafted .csv file to the User Importer, because file contents can appear in an error message. The XSS can lead to local file…
When was CVE-2019-11537 disclosed?
CVE-2019-11537 was first published on April 25, 2019, with the most recent update on July 10, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2019-11537 actively exploited?
CVE-2019-11537 is not currently on CISA's Known Exploited Vulnerabilities catalog. EchelonGraph's EG-KEV model classifies it as weaponized: a functional public exploit exists. FIRST EPSS estimates a 4.6% probability of exploitation in the next 30 days (91st percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2019-11537?
CVE-2019-11537 has a CVSS v3 base score of 6.1 (NVD).
How do I remediate CVE-2019-11537?
A fix for CVE-2019-11537 is available: update to the fixed version the vendor names in its advisory.

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