CVE-2018-20129

HIGHNVD 8.88.8—
EchelonGraph scoreMEDIUM confidence

Score 8.8 from GitHub Security Advisory (severity: HIGH) published 2022-05-14. NVD baseline CVSS 8.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
8.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 8%CVSS: 8.8Exploit: None knownExposed: 0

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

An issue was discovered in DedeCMS V5.7 SP2. uploads/include/dialog/select_images_post.php allows remote attackers to upload and execute arbitrary PHP code via a double extension and a modified ".php" substring, in conjunction with the image/jpeg content type, as demonstrated by the filename=1.jpg.p*hp value.

CVSS v3
8.8
EG Score
8.8(medium)
EG Risk
47(Track)
EG Risk 47/100SSVC: 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
Severity88% × 45%
Exploitation8% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
8%
EPSS %ILE
95%
KEV
Not listed

Published

December 13, 2018

Last Modified

November 21, 2024

References (2)

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 5× in last 7d / 22× 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 130 total refreshes for this CVE.

  1. 2026-09-24 13:59 UTCEPSS rescore
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  1. 2026-08-19 17:00 UTCEPSS rescore
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  24. 2026-07-23 01:35 UTCEG score recompute
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  26. 2026-07-22 14:05 UTCEPSS rescore
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  74. 2026-06-19 19:23 UTCEPSS rescore
  75. 2026-06-19 19:23 UTCEPSS rescore

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Frequently asked(5)

What is CVE-2018-20129?
CVE-2018-20129 is a high vulnerability published on December 13, 2018. An issue was discovered in DedeCMS V5.7 SP2. uploads/include/dialog/selectimagespost.php allows remote attackers to upload and execute arbitrary PHP code via a double extension and a modified ".php" substring, in conjunction with the image/jpeg content type, as demonstrated by the…
When was CVE-2018-20129 disclosed?
CVE-2018-20129 was first published in the National Vulnerability Database on December 13, 2018, 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-2018-20129 actively exploited?
CVE-2018-20129 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 8% probability of exploitation in the next 30 days, which ranks it in the top 5.3% of all scored CVEs.
What is the CVSS score of CVE-2018-20129?
CVE-2018-20129 has a CVSS v3 base score of 8.8 (NVD).
How do I remediate CVE-2018-20129?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2018-20129, 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.

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