CVE-2026-27537

MEDIUMPre-NVD 6.56.5—
EchelonGraph scoreMEDIUM confidence

Score 6.5 from GitHub Security Advisory published 2026-08-13. A secondary CVSS source baseline 6.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
6.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.2%CVSS: 6.5Exploit: None knownExposed services: Not assessed

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

Unauthenticated Cross Site Scripting (XSS) in Popup by Supsystic <= 1.11.2 versions.

CVSS v3
6.5
EG Score
6.5MEDIUMmedium confidence
EG Risk
29
EG Risk 29/100CISA SSVC

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
Severity65% × 45%
Exploitation0% × 40%
Automatability0% × 15%
CISA SSVC: Track at every mission impact level.
Action: No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines, and watch the vendor's advisory for the fix.
EPSS PROB
0.2%
EPSS %ILE
11th
KEV
Not listed

CISA SSVCTrack at every mission impact level.

No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines, and watch the vendor's advisory for the fix.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

August 13, 2026

Last Modified

August 14, 2026

Advisory Details (1)

Auto-updated Aug 13, 2026
No patch confirmed yet.
generic

Cross Site Scripting (XSS) in WordPress Popup by Supsystic Plugin - Patchstack

https://patchstack.com/database/wordpress/plugin/popup-by-supsystic/vulnerability/wordpress-popup-by-supsystic-plugin-1-11-2-cross-site-scripting-xss-vulnerability?_s_id=cve

Vendor Advisories for CVE-2026-27537(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 12× in last 7d / 68× 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 131 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-27537?
CVE-2026-27537 is a medium vulnerability published on August 13, 2026. Unauthenticated Cross Site Scripting (XSS) in Popup by Supsystic <= 1.11.2 versions.
When was CVE-2026-27537 disclosed?
CVE-2026-27537 was first published on August 13, 2026, with the most recent update on August 14, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-27537 actively exploited?
CVE-2026-27537 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (11th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-27537?
CVE-2026-27537 has a CVSS base score of 6.5 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-27537?
No fix for CVE-2026-27537 is confirmed yet. Until one is published, restrict network exposure of the affected system or apply the vendor's mitigation — for example, keep it off the internet or limit it to trusted networks — and watch the vendor's advisory for the fix. The vendor advisories EchelonGraph has for CVE-2026-27537 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2026-27537

Explore →

Is Your Infrastructure Affected by CVE-2026-27537?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Book a Demo →Browse All CVEs