CVE-2018-11686

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2022-05-24. NVD baseline CVSS 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Elevated
9.8EG
EchelonGraph verdictPatch this weekExploitation is likely or a public exploit exists.
  • High exploitation likelihood — EPSS 53%
CISA-KEV: Not listedEPSS PROB: 53%CVSS: 9.8Exploit: Elevated riskExposed: 0

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

The Publish Service in FlexPaper (later renamed FlowPaper) 2.3.6 allows remote code execution via setup.php and change_config.php.

CVSS v3
9.8
EG Score
9.8(medium)
EG Risk
69(Track*)
EG Risk 69/100SSVC: 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
Severity98% × 45%
Exploitation50% × 40%
Automatability30% × 15%
Action: Watch closely — could escalate to Attend.
EPSS PROB
53%
EPSS %ILE
99%
KEV
Not listed

Published

July 3, 2019

Last Modified

November 21, 2024

Advisory Details (1)

Auto-updated Aug 21, 2026
No patch confirmed yet.
generic

FlowPaper Blog

https://flowpaper.com/blog/

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 7× in last 7d / 23× 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.

  1. 2026-08-20 22:51 UTCEPSS rescore
  2. 2026-08-19 17:00 UTCEPSS rescore
  3. 2026-08-18 13:43 UTCEPSS rescore
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  20. 2026-07-23 14:15 UTCEPSS rescore
  21. 2026-07-23 14:15 UTCEPSS rescore
  22. 2026-07-23 01:32 UTCEG score recompute
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  24. 2026-07-22 14:04 UTCEPSS rescore
  25. 2026-07-21 15:21 UTCEPSS rescore
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  1. 2026-07-20 17:04 UTCEPSS rescore
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  19. 2026-06-30 23:19 UTCEPSS rescore
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  22. 2026-06-28 04:53 UTCEPSS rescore
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  24. 2026-06-27 03:06 UTCEPSS rescore
  25. 2026-06-25 13:47 UTCEPSS rescore
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  40. 2026-06-16 17:50 UTCEPSS rescore
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  42. 2026-06-15 17:45 UTCEPSS rescore
  43. 2026-06-13 22:58 UTCEPSS rescore
  44. 2026-06-13 22:58 UTCEPSS rescore
  45. 2026-06-12 23:09 UTCEPSS rescore
  46. 2026-06-11 13:57 UTCEPSS rescore
  47. 2026-06-10 22:16 UTCEPSS rescore
  48. 2026-06-07 15:22 UTCEPSS rescore
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  50. 2026-06-05 22:45 UTCEPSS rescore
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  52. 2026-05-31 00:14 UTCEPSS rescore
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  54. 2026-05-28 13:42 UTCEPSS rescore
  55. 2026-05-28 13:42 UTCEPSS rescore
  56. 2026-05-27 17:45 UTCEG score recompute
  57. 2026-05-27 17:45 UTCGHSA enrichment
  58. 2026-05-27 13:38 UTCEPSS rescore
  59. 2026-05-27 13:38 UTCEPSS rescore
  60. 2026-05-26 07:17 UTCEPSS rescore
  61. 2026-05-26 07:17 UTCEPSS rescore
  62. 2026-05-23 04:35 UTCOSV refresh

Publicly available exploits

(3 references)

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

  • GitHub PoCmpgn/CVE-2018-11686
    First seen Mar 20, 2019

    CVE-2018-11686 - FlexPaper PHP Publish Service RCE <= 2.3.6

    Open source ↗
  • Exploit-DBEDB-46528
    First seen Mar 11, 2019

    Flexpaper PHP Publish Service 2.3.6 - Remote Code Execution

    Open source ↗
  • Nucleihttp/cves/2018/CVE-2018-11686.yaml
    First seen Jan 1, 2018

    FlexPaper/FlowPaper 2.3.6 - Remote Code Execution

    Open source ↗

Frequently asked(5)

What is CVE-2018-11686?
CVE-2018-11686 is a critical vulnerability published on July 3, 2019. The Publish Service in FlexPaper (later renamed FlowPaper) 2.3.6 allows remote code execution via setup.php and change_config.php.
When was CVE-2018-11686 disclosed?
CVE-2018-11686 was first published in the National Vulnerability Database on July 3, 2019, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2018-11686 actively exploited?
CVE-2018-11686 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-2018-11686?
CVE-2018-11686 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2018-11686?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2018-11686, 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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