CVE-2017-16949

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2022-05-14. NVD baseline CVSS 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Elevated
9.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 19%CVSS: 9.8Exploit: NoneExposed: 0

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

An issue was discovered in the AccessKeys AccessPress Anonymous Post Pro plugin through 3.1.9 for WordPress. Improper input sanitization allows the attacker to override the settings for allowed file extensions and upload file size, related to inc/cores/file-uploader.php and file-uploader/file-uploader-class.php. This allows the attacker to upload anything they want to the server, as demonstrated by an action=ap_file_upload_action&allowedExtensions[]=php request to /wp-admin/admin-ajax.php that results in a .php file upload and resultant PHP code execution.

CVSS v3
9.8
EG Score
9.8(medium)
EPSS
97.0%
KEV
Not listed

Published

December 19, 2017

Last Modified

May 13, 2026

Advisory Details (2)

Auto-updated May 17, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic🟡 PoC Available

Accesspress Anonymous Post Pro < 3.2.0 - Arbitrary File Upload - PHP webapps Exploit

https://www.exploit-db.com/exploits/43324/
generic

Packet Storm

http://packetstormsecurity.com/files/145398/Accesspress-Anonymous-Post-Pro-Unauthenticated-Arbitrary-File-Upload.html

Data Freshness Timeline

(refreshed 6× in last 7d / 27× 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. 2026-07-07 13:42 UTCEPSS rescore
  2. 2026-07-06 16:24 UTCEPSS rescore
  3. 2026-07-06 02:20 UTCEPSS rescore
  4. 2026-07-05 02:27 UTCEPSS rescore
  5. 2026-07-01 15:02 UTCEPSS rescore
  6. 2026-07-01 15:02 UTCEPSS rescore
  7. 2026-06-29 14:03 UTCEPSS rescore
  8. 2026-06-28 14:04 UTCEPSS rescore
  9. 2026-06-28 04:53 UTCEPSS rescore
  10. 2026-06-27 03:05 UTCEPSS rescore
  11. 2026-06-25 13:47 UTCEPSS rescore
  12. 2026-06-25 13:47 UTCEPSS rescore
  13. 2026-06-24 14:02 UTCEPSS rescore
  14. 2026-06-23 21:30 UTCEPSS rescore
  15. 2026-06-22 14:23 UTCEPSS rescore
  16. 2026-06-22 14:23 UTCEPSS rescore
  17. 2026-06-21 01:57 UTCEPSS rescore
  18. 2026-06-21 01:57 UTCEPSS rescore
  19. 2026-06-18 17:50 UTCEPSS rescore
  20. 2026-06-17 17:50 UTCEPSS rescore
  21. 2026-06-16 17:50 UTCEPSS rescore
  22. 2026-06-15 17:45 UTCEPSS rescore
  23. 2026-06-13 22:57 UTCEPSS rescore
  24. 2026-06-12 23:09 UTCEPSS rescore
  25. 2026-06-11 13:57 UTCEPSS rescore
Show 44 more
  1. 2026-06-10 22:15 UTCEPSS rescore
  2. 2026-06-08 14:14 UTCEPSS rescore
  3. 2026-06-06 13:45 UTCEPSS rescore
  4. 2026-06-06 13:45 UTCEPSS rescore
  5. 2026-06-05 22:44 UTCEPSS rescore
  6. 2026-06-05 06:08 UTCEPSS rescore
  7. 2026-06-05 06:08 UTCEPSS rescore
  8. 2026-06-04 13:10 UTCEPSS rescore
  9. 2026-06-04 13:10 UTCEPSS rescore
  10. 2026-06-02 20:11 UTCEPSS rescore
  11. 2026-06-02 20:11 UTCEPSS rescore
  12. 2026-05-31 22:28 UTCEPSS rescore
  13. 2026-05-31 00:14 UTCEPSS rescore
  14. 2026-05-29 13:41 UTCEPSS rescore
  15. 2026-05-28 13:42 UTCEPSS rescore
  16. 2026-05-28 13:42 UTCEPSS rescore
  17. 2026-05-22 21:15 UTCEPSS rescore
  18. 2026-05-22 21:15 UTCEPSS rescore
  19. 2026-05-22 21:15 UTCEPSS rescore
  20. 2026-05-20 22:37 UTCEPSS rescore
  21. 2026-05-20 22:37 UTCEPSS rescore
  22. 2026-05-20 11:21 UTCEPSS rescore
  23. 2026-05-20 11:21 UTCEPSS rescore
  24. 2026-05-20 09:37 UTCEG score recompute
  25. 2026-05-20 09:37 UTCGHSA enrichment
  26. 2026-05-20 05:49 UTCEG score recompute
  27. 2026-05-20 05:49 UTCGHSA enrichment
  28. 2026-05-20 02:02 UTCEG score recompute
  29. 2026-05-20 02:02 UTCGHSA enrichment
  30. 2026-05-19 22:15 UTCEG score recompute
  31. 2026-05-19 22:15 UTCGHSA enrichment
  32. 2026-05-19 18:28 UTCEG score recompute
  33. 2026-05-19 18:28 UTCGHSA enrichment
  34. 2026-05-19 14:41 UTCEG score recompute
  35. 2026-05-19 14:41 UTCGHSA enrichment
  36. 2026-05-19 10:54 UTCEG score recompute
  37. 2026-05-19 10:54 UTCGHSA enrichment
  38. 2026-05-19 07:06 UTCEG score recompute
  39. 2026-05-19 07:06 UTCGHSA enrichment
  40. 2026-05-19 03:19 UTCEG score recompute
  41. 2026-05-19 03:19 UTCGHSA enrichment
  42. 2026-05-18 23:31 UTCEG score recompute
  43. 2026-05-18 21:30 UTCEPSS rescore
  44. 2026-05-18 21:30 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-43324
    First seen Dec 12, 2017

    Accesspress Anonymous Post Pro < 3.2.0 - Arbitrary File Upload

    Open source ↗

Frequently asked(5)

What is CVE-2017-16949?
CVE-2017-16949 is a critical vulnerability published on December 19, 2017. An issue was discovered in the AccessKeys AccessPress Anonymous Post Pro plugin through 3.1.9 for WordPress. Improper input sanitization allows the attacker to override the settings for allowed file extensions and upload file size, related to inc/cores/file-uploader.php and…
When was CVE-2017-16949 disclosed?
CVE-2017-16949 was first published in the National Vulnerability Database on December 19, 2017, with the most recent update on May 13, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2017-16949 actively exploited?
CVE-2017-16949 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 97.0% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2017-16949?
CVE-2017-16949 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2017-16949?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2017-16949, 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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