CVE-2026-63361

HIGHPre-NVD 8.58.5—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.5 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.5% (42nd percentile of EPSS-scored CVEs). GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
Trending — 3 sources updated this weekElevated
8.5EG
EchelonGraph verdictPlan mitigationSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.5%CVSS: 8.5Exploit: Elevated riskExposed services: Not assessed

An upstream fix is merged but not yet released — mitigate (WAF / firewall / segmentation) until the release ships, then apply it.

LimeSurvey Community Edition 7.0.5 contains an authenticated reflected cross-site scripting vulnerability in the HTML editor popup endpoint. The text and name query parameters are passed through a blacklist sanitizer and then rendered without context-appropriate output encoding.

CVSS v3
8.5
EG Score
8.5HIGHmedium confidence
EG Risk
54
EG Risk 54/100CISA 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
Severity85% × 45%
Exploitation40% × 40%
Automatability0% × 15%
CISA SSVC: Track at low, Track* at medium and Attend at high mission impact.
Action: An upstream fix is merged but not yet in a tagged release. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines at low or medium mission impact and sooner than that at high until it ships, then apply the release.
EPSS PROB
0.5%
EPSS %ILE
42nd
KEV
Not listed

CISA SSVCTrack at low, Track* at medium and Attend at high mission impact.

An upstream fix is merged but not yet in a tagged release. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines at low or medium mission impact and sooner than that at high until it ships, then apply the release.

Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (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 14, 2026

Last Modified

August 28, 2026

Advisory Details (3)

Auto-updated Aug 14, 2026
Upstream fix merged — awaiting tagged release. Sources: github_commit.
github_commit

commit a8993bfd05c4 (LimeSurvey/LimeSurvey)

Fix landed in LimeSurvey/LimeSurvey commit a8993bfd05c4 — awaiting tagged release

https://github.com/LimeSurvey/LimeSurvey/commit/a8993bfd05c4a11255b8400ed9c41a2c22e93aa4
generic

GitHub - LimeSurvey/LimeSurvey: 🔥 LimeSurvey – A powerful, open-source survey platform. A free alternative to SurveyMonkey, Typeform, Qualtrics, and Google Forms, making it simple to create online surveys and forms with unmatched flexibility. · GitHub

https://github.com/LimeSurvey/LimeSurvey
generic

LimeSurvey Community Edition 7.0.5+260623 - Reflected XSS in HTML editor popup | Fluid Attacks

https://fluidattacks.com/es/advisories/mercedes

Vendor Advisories for CVE-2026-63361(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 21× in last 7d / 93× 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 188 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-63361?
CVE-2026-63361 is a high vulnerability published on August 14, 2026. LimeSurvey Community Edition 7.0.5 contains an authenticated reflected cross-site scripting vulnerability in the HTML editor popup endpoint. The text and name query parameters are passed through a blacklist sanitizer and then rendered without context-appropriate output encoding.
When was CVE-2026-63361 disclosed?
CVE-2026-63361 was first published on August 14, 2026, with the most recent update on August 28, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-63361 actively exploited?
CVE-2026-63361 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.5% probability of exploitation in the next 30 days (42nd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-63361?
CVE-2026-63361 has a CVSS base score of 8.5 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-63361?
An upstream fix for CVE-2026-63361 has been merged but is not yet in a tagged release. Until it ships, restrict network exposure of the affected system or apply the vendor's mitigation, then update to the release that contains the fix. The vendor advisories EchelonGraph has for CVE-2026-63361 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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