CVE-2018-17082

MEDIUMNVD 6.16.1—
EchelonGraph scoreMEDIUM confidence

Score 6.1 from GitHub Security Advisory published 2022-05-14. NVD baseline CVSS 6.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Elevated
6.1EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 4%CVSS: 6.1Exploit: Elevated riskExposed: 0

A fix is available — apply it.

The Apache2 component in PHP before 5.6.38, 7.0.x before 7.0.32, 7.1.x before 7.1.22, and 7.2.x before 7.2.10 allows XSS via the body of a "Transfer-Encoding: chunked" request, because the bucket brigade is mishandled in the php_handler function in sapi/apache2handler/sapi_apache2.c.

CVSS v3
6.1
EG Score
6.1(medium)
EG Risk
48(Track)
EG Risk 48/100SSVC: 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
Severity61% × 45%
Exploitation40% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
4%
EPSS %ILE
90%
KEV
Not listed

Published

September 16, 2018

Last Modified

November 21, 2024

References (20)

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatrh-php71-php-0:7.1.30-1.el72019-08-19redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(3 across 3 ecosystems)
Alpine:v3.5(1)
PackageVulnerable rangeFixed inDependents
php55.2.10-r0 ... 5.6.9-r1 (173 versions)5.6.38-r0—
Debian:8(1)
PackageVulnerable rangeFixed inDependents
php55.6.11+dfsg-1 ... 5.6.9+dfsg-1 (43 versions)5.6.38+dfsg-0+deb8u1—
Debian:9(1)
PackageVulnerable rangeFixed inDependents
php7.07.0.19-1 ... 7.0.32-1 (17 versions)7.0.33-0+deb9u1—

Weakness Classification(1)

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

All Vendor Advisories

(1)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 6× in last 7d / 28× 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 114 total refreshes for this CVE.

  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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  15. 2026-08-06 12:40 UTCOSV refresh
  16. 2026-08-04 15:05 UTCEPSS rescore
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  1. 2026-07-23 14:15 UTCEPSS rescore
  2. 2026-07-23 01:34 UTCEG score recompute
  3. 2026-07-22 22:14 UTCEG score recompute
  4. 2026-07-22 14:04 UTCEPSS rescore
  5. 2026-07-21 15:21 UTCEPSS rescore
  6. 2026-07-21 05:47 UTCOSV refresh
  7. 2026-07-20 17:04 UTCEPSS rescore
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  9. 2026-07-19 14:28 UTCEPSS rescore
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  17. 2026-07-12 05:43 UTCEPSS rescore
  18. 2026-07-11 08:24 UTCEPSS rescore
  19. 2026-07-09 19:06 UTCEPSS rescore
  20. 2026-07-08 15:11 UTCEPSS rescore
  21. 2026-07-07 13:42 UTCEPSS rescore
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  23. 2026-07-06 16:24 UTCEPSS rescore
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  25. 2026-07-06 02:20 UTCEPSS rescore
  26. 2026-07-05 02:27 UTCEPSS rescore
  27. 2026-07-04 06:28 UTCEPSS rescore
  28. 2026-07-04 00:56 UTCOSV refresh
  29. 2026-07-02 16:54 UTCEPSS rescore
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  32. 2026-06-30 23:19 UTCEPSS rescore
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  40. 2026-06-24 14:02 UTCEPSS rescore
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  42. 2026-06-23 21:30 UTCEPSS rescore
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  44. 2026-06-21 14:54 UTCEPSS rescore
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  46. 2026-06-21 01:57 UTCEPSS rescore
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  48. 2026-06-19 19:23 UTCEPSS rescore
  49. 2026-06-18 17:50 UTCEPSS rescore
  50. 2026-06-18 17:50 UTCEPSS rescore
  51. 2026-06-17 17:50 UTCEPSS rescore
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  53. 2026-06-16 17:50 UTCEPSS rescore
  54. 2026-06-16 17:50 UTCEPSS rescore
  55. 2026-06-15 17:45 UTCEPSS rescore
  56. 2026-06-15 13:13 UTCOSV refresh
  57. 2026-06-14 23:14 UTCEPSS rescore
  58. 2026-06-14 23:14 UTCEPSS rescore
  59. 2026-06-13 22:58 UTCEPSS rescore
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  61. 2026-06-12 23:09 UTCEPSS rescore
  62. 2026-06-11 13:57 UTCEPSS rescore
  63. 2026-06-10 22:16 UTCEPSS rescore
  64. 2026-06-10 13:19 UTCEPSS rescore
  65. 2026-06-05 22:45 UTCEPSS rescore
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  73. 2026-06-01 13:49 UTCEPSS rescore
  74. 2026-05-31 22:29 UTCEPSS rescore
  75. 2026-05-31 22:28 UTCEPSS rescore

Publicly available exploits

(1 reference)

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

  • Nucleihttp/cves/2018/CVE-2018-17082.yaml
    First seen Jan 1, 2018

    Apache2 - Transfer-Encoding Chunked XSS

    Open source ↗

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2018-17082?
CVE-2018-17082 is a medium vulnerability published on September 16, 2018. The Apache2 component in PHP before 5.6.38, 7.0.x before 7.0.32, 7.1.x before 7.1.22, and 7.2.x before 7.2.10 allows XSS via the body of a "Transfer-Encoding: chunked" request, because the bucket brigade is mishandled in the phphandler function in sapi/apache2handler/sapiapache2.c.
When was CVE-2018-17082 disclosed?
CVE-2018-17082 was first published in the National Vulnerability Database on September 16, 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-2018-17082 actively exploited?
CVE-2018-17082 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 4% probability of exploitation in the next 30 days, which ranks it in the top 10.0% of all scored CVEs.
What is the CVSS score of CVE-2018-17082?
CVE-2018-17082 has a CVSS v3 base score of 6.1 (NVD).
How do I remediate CVE-2018-17082?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2018-17082, 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

See which npm, PyPI, Go, and Maven packages are affected by CVE-2018-17082

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