CVE-2018-11564

MEDIUMNVD 4.84.8—
EchelonGraph scoreMEDIUM confidence

Score 4.8 from GitHub Security Advisory published 2022-05-14. NVD baseline CVSS 4.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 3 sources updated this weekElevated
4.8
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 3%CVSS: 4.8Exploit: NoneExposed: 0

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

Stored XSS in YOOtheme Pagekit 1.0.13 and earlier allows a user to upload malicious code via the picture upload feature. A user with elevated privileges could upload a photo to the system in an SVG format. This file will be uploaded to the system and it will not be stripped or filtered. The user can create a link on the website pointing to "/storage/poc.svg" that will point to http://localhost/pagekit/storage/poc.svg. When a user comes along to click that link, it will trigger a XSS attack.

CVSS v3
4.8
EG Score
4.8(medium)
EG Risk
42(Track)
EG Risk 42/100SSVC: 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
Severity48% × 45%
Exploitation40% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS
86.7%
KEV
Not listed

Published

June 2, 2018

Last Modified

November 21, 2024

References (6)

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
composerpagekit/pagekit—ghsa

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

(1 across 1 ecosystem)
Packagist(1)
PackageVulnerable rangeFixed inDependents
pagekit/pagekit1.0.13——

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 12× in last 7d / 41× 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. 2026-07-23 01:32 UTCEG score recompute
  2. 2026-07-22 22:12 UTCEG score recompute
  3. 2026-07-22 14:04 UTCEPSS rescore
  4. 2026-07-21 15:21 UTCEPSS rescore
  5. 2026-07-21 12:18 UTCOSV refresh
  6. 2026-07-20 17:04 UTCEPSS rescore
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  1. 2026-07-05 02:27 UTCEPSS rescore
  2. 2026-07-04 07:56 UTCOSV refresh
  3. 2026-07-04 06:28 UTCEPSS rescore
  4. 2026-07-02 16:54 UTCEPSS rescore
  5. 2026-07-01 15:03 UTCEPSS rescore
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  7. 2026-06-30 23:19 UTCEPSS rescore
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  9. 2026-06-28 04:53 UTCEPSS rescore
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  11. 2026-06-27 03:06 UTCEPSS rescore
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  18. 2026-06-21 01:57 UTCEPSS rescore
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  25. 2026-06-16 17:50 UTCEPSS rescore
  26. 2026-06-16 17:50 UTCEPSS rescore
  27. 2026-06-15 19:09 UTCOSV refresh
  28. 2026-06-15 17:45 UTCEPSS rescore
  29. 2026-06-14 23:14 UTCEPSS rescore
  30. 2026-06-14 23:14 UTCEPSS rescore
  31. 2026-06-13 22:58 UTCEPSS rescore
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  33. 2026-06-12 23:09 UTCEPSS rescore
  34. 2026-06-11 13:57 UTCEPSS rescore
  35. 2026-06-10 22:16 UTCEPSS rescore
  36. 2026-06-10 13:19 UTCEPSS rescore
  37. 2026-06-08 14:14 UTCEPSS rescore
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  39. 2026-06-07 15:22 UTCEPSS rescore
  40. 2026-06-07 15:22 UTCEPSS rescore
  41. 2026-06-06 13:45 UTCEPSS rescore
  42. 2026-06-06 13:45 UTCEPSS rescore
  43. 2026-06-05 22:45 UTCEPSS rescore
  44. 2026-06-05 22:44 UTCEPSS rescore
  45. 2026-06-05 06:08 UTCEPSS rescore
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  47. 2026-06-04 13:10 UTCEPSS rescore
  48. 2026-06-04 13:10 UTCEPSS rescore
  49. 2026-06-02 20:11 UTCEPSS rescore
  50. 2026-06-02 20:11 UTCEPSS rescore
  51. 2026-06-01 13:49 UTCEPSS rescore
  52. 2026-05-31 22:29 UTCEPSS rescore
  53. 2026-05-31 22:28 UTCEPSS rescore
  54. 2026-05-31 00:14 UTCEPSS rescore
  55. 2026-05-31 00:14 UTCEPSS rescore
  56. 2026-05-29 13:41 UTCEPSS rescore
  57. 2026-05-28 13:42 UTCEPSS rescore
  58. 2026-05-28 13:42 UTCEPSS rescore
  59. 2026-05-28 07:29 UTCEG score recompute
  60. 2026-05-28 07:29 UTCGHSA enrichment
  61. 2026-05-27 13:38 UTCEPSS rescore
  62. 2026-05-27 13:38 UTCEPSS rescore
  63. 2026-05-26 13:42 UTCEPSS rescore
  64. 2026-05-26 13:42 UTCEPSS rescore
  65. 2026-05-26 07:17 UTCEPSS rescore
  66. 2026-05-26 07:17 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-44837
    First seen Jun 5, 2018

    Pagekit < 1.0.13 - Cross-Site Scripting Code Generator

    Open source ↗

Related CVEs(same product + same CWE)

Frequently asked(5)

What is CVE-2018-11564?
CVE-2018-11564 is a medium vulnerability published on June 2, 2018. Stored XSS in YOOtheme Pagekit 1.0.13 and earlier allows a user to upload malicious code via the picture upload feature. A user with elevated privileges could upload a photo to the system in an SVG format. This file will be uploaded to the system and it will not be stripped or filtered. The user…
When was CVE-2018-11564 disclosed?
CVE-2018-11564 was first published in the National Vulnerability Database on June 2, 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-2018-11564 actively exploited?
CVE-2018-11564 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 86.7% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2018-11564?
CVE-2018-11564 has a CVSS v3 base score of 4.8 (NVD).
How do I remediate CVE-2018-11564?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2018-11564, 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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