CVE-2026-9577

MEDIUMPre-NVD 4.84.8—
EchelonGraph scoreMEDIUM confidence

Score 4.8 from GitHub Security Advisory published 2026-07-23. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 4.8; sources differ by 0.0.

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

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

The Post Status Notifier Lite WordPress plugin before 1.13.0 does not properly escape the mod URL parameter before reflecting it into the admin settings page (admin.php?page=post-status-notifier-lite), leading to a Reflected Cross-Site Scripting vulnerability that fires in the administrator's session when they are tricked into following a crafted URL.

CVSS v3
4.8
EG Score
4.8(medium)
EG Risk
38(Track)
EG Risk 38/100SSVC: 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%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
15%
KEV
Not listed

Published

July 23, 2026

Last Modified

July 23, 2026

Advisory Details (1)

Auto-updated Jul 26, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic🟡 PoC Available

Post Status Notifier Lite < 1.13.0 – Reflected XSS via mod Parameter | CVE 2026-9577 | Plugin Vulnerabilities

https://wpscan.com/vulnerability/b316e14a-4260-43c4-996c-345c7f9f7d74/

Vendor Advisories for CVE-2026-9577(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 15× in last 7d / 79× 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 103 total refreshes for this CVE.

  1. 2026-08-30 01:22 UTCEPSS rescore
  2. 2026-08-30 00:47 UTCEG score recompute
  3. 2026-08-30 00:47 UTCGHSA enrichment
  4. 2026-08-28 21:42 UTCEPSS rescore
  5. 2026-08-27 14:25 UTCEPSS rescore
  6. 2026-08-27 10:15 UTCEG score recompute
  7. 2026-08-27 10:15 UTCGHSA enrichment
  8. 2026-08-26 14:47 UTCEPSS rescore
  9. 2026-08-26 06:54 UTCEG score recompute
  10. 2026-08-26 06:54 UTCGHSA enrichment
  11. 2026-08-25 13:49 UTCEPSS rescore
  12. 2026-08-25 05:08 UTCEG score recompute
  13. 2026-08-25 05:08 UTCGHSA enrichment
  14. 2026-08-24 14:18 UTCEPSS rescore
  15. 2026-08-24 03:29 UTCGHSA enrichment
  16. 2026-08-23 01:46 UTCEG score recompute
  17. 2026-08-23 01:46 UTCGHSA enrichment
  18. 2026-08-23 00:19 UTCEPSS rescore
  19. 2026-08-22 00:06 UTCEG score recompute
  20. 2026-08-22 00:06 UTCGHSA enrichment
  21. 2026-08-21 23:49 UTCEPSS rescore
  22. 2026-08-20 22:56 UTCEPSS rescore
  23. 2026-08-20 22:27 UTCGHSA enrichment
  24. 2026-08-19 20:48 UTCEG score recompute
  25. 2026-08-19 20:48 UTCGHSA enrichment
Show 75 more
  1. 2026-08-19 17:04 UTCEPSS rescore
  2. 2026-08-18 19:09 UTCEG score recompute
  3. 2026-08-18 19:09 UTCGHSA enrichment
  4. 2026-08-18 13:49 UTCEPSS rescore
  5. 2026-08-17 14:01 UTCEG score recompute
  6. 2026-08-17 14:01 UTCGHSA enrichment
  7. 2026-08-17 13:47 UTCEPSS rescore
  8. 2026-08-16 14:56 UTCEPSS rescore
  9. 2026-08-16 12:22 UTCEG score recompute
  10. 2026-08-16 12:22 UTCGHSA enrichment
  11. 2026-08-16 02:15 UTCEPSS rescore
  12. 2026-08-15 10:44 UTCEG score recompute
  13. 2026-08-15 10:44 UTCGHSA enrichment
  14. 2026-08-15 01:31 UTCEPSS rescore
  15. 2026-08-14 09:04 UTCEG score recompute
  16. 2026-08-14 09:04 UTCGHSA enrichment
  17. 2026-08-13 22:00 UTCEPSS rescore
  18. 2026-08-13 07:26 UTCEG score recompute
  19. 2026-08-13 07:26 UTCGHSA enrichment
  20. 2026-08-12 13:51 UTCEPSS rescore
  21. 2026-08-12 05:47 UTCEG score recompute
  22. 2026-08-12 05:47 UTCGHSA enrichment
  23. 2026-08-11 13:43 UTCEPSS rescore
  24. 2026-08-11 04:08 UTCEG score recompute
  25. 2026-08-11 04:08 UTCGHSA enrichment
  26. 2026-08-11 00:00 UTCEPSS rescore
  27. 2026-08-10 02:29 UTCGHSA enrichment
  28. 2026-08-09 00:51 UTCEG score recompute
  29. 2026-08-09 00:51 UTCGHSA enrichment
  30. 2026-08-08 16:37 UTCEPSS rescore
  31. 2026-08-07 23:12 UTCEG score recompute
  32. 2026-08-07 23:12 UTCGHSA enrichment
  33. 2026-08-07 16:30 UTCEPSS rescore
  34. 2026-08-06 21:33 UTCEG score recompute
  35. 2026-08-06 21:33 UTCGHSA enrichment
  36. 2026-08-06 13:47 UTCEPSS rescore
  37. 2026-08-05 19:55 UTCEG score recompute
  38. 2026-08-05 19:55 UTCGHSA enrichment
  39. 2026-08-05 19:17 UTCEPSS rescore
  40. 2026-08-04 18:16 UTCEG score recompute
  41. 2026-08-04 18:16 UTCGHSA enrichment
  42. 2026-08-04 15:10 UTCEPSS rescore
  43. 2026-08-04 10:39 UTCEPSS rescore
  44. 2026-08-03 16:37 UTCEG score recompute
  45. 2026-08-03 16:37 UTCGHSA enrichment
  46. 2026-08-03 10:36 UTCEPSS rescore
  47. 2026-08-02 14:59 UTCEG score recompute
  48. 2026-08-02 14:59 UTCGHSA enrichment
  49. 2026-08-02 02:27 UTCEPSS rescore
  50. 2026-08-01 13:20 UTCEG score recompute
  51. 2026-08-01 13:20 UTCGHSA enrichment
  52. 2026-08-01 04:16 UTCEPSS rescore
  53. 2026-07-31 11:40 UTCEG score recompute
  54. 2026-07-31 11:39 UTCGHSA enrichment
  55. 2026-07-30 16:28 UTCEPSS rescore
  56. 2026-07-30 09:59 UTCEG score recompute
  57. 2026-07-30 09:58 UTCGHSA enrichment
  58. 2026-07-30 01:30 UTCEPSS rescore
  59. 2026-07-29 08:20 UTCEG score recompute
  60. 2026-07-29 08:19 UTCGHSA enrichment
  61. 2026-07-28 15:37 UTCEPSS rescore
  62. 2026-07-28 06:40 UTCEG score recompute
  63. 2026-07-28 06:40 UTCGHSA enrichment
  64. 2026-07-27 14:14 UTCEPSS rescore
  65. 2026-07-27 05:00 UTCEG score recompute
  66. 2026-07-27 05:00 UTCGHSA enrichment
  67. 2026-07-26 14:54 UTCEPSS rescore
  68. 2026-07-26 03:20 UTCEG score recompute
  69. 2026-07-26 03:20 UTCGHSA enrichment
  70. 2026-07-25 14:18 UTCEPSS rescore
  71. 2026-07-24 14:18 UTCEPSS rescore
  72. 2026-07-23 14:57 UTCEG score recompute▲ 4.80
  73. 2026-07-23 14:57 UTCGHSA enrichment
  74. 2026-07-23 14:56 UTCMITRE cvelistV5CVSS v3 → 4.8 · severity → MEDIUM
  75. 2026-07-23 14:18 UTCEPSS rescore

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-9577?
CVE-2026-9577 is a medium vulnerability published on July 23, 2026. The Post Status Notifier Lite WordPress plugin before 1.13.0 does not properly escape the mod URL parameter before reflecting it into the admin settings page (admin.php?page=post-status-notifier-lite), leading to a Reflected Cross-Site Scripting vulnerability that fires in the administrator's…
When was CVE-2026-9577 disclosed?
CVE-2026-9577 was first published in the National Vulnerability Database on July 23, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-9577 actively exploited?
CVE-2026-9577 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 84.8% of all scored CVEs.
What is the CVSS score of CVE-2026-9577?
CVE-2026-9577 has a CVSS v3.1 base score of 4.8 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-9577?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-9577, 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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