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: 0.3%, top 77% of all CVEs by exploit prediction. 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 — 4 sources updated this weekElevated
8.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.5Exploit: Elevated riskExposed: 0

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

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
8.5(medium)
EG Risk
54(Track*)
EG Risk 54/100SSVC: 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
Severity85% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Watch closely — could escalate to Attend.
EPSS PROB
0%
EPSS %ILE
23%
KEV
Not listed

Published

August 14, 2026

Last Modified

August 14, 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 29× in last 7d / 29× 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. 2026-08-20 10:54 UTCGHSA enrichment
  2. 2026-08-19 22:41 UTCEG score recompute
  3. 2026-08-19 22:41 UTCGHSA enrichment
  4. 2026-08-19 17:04 UTCEPSS rescore
  5. 2026-08-19 10:27 UTCGHSA enrichment
  6. 2026-08-18 22:14 UTCEG score recompute
  7. 2026-08-18 22:14 UTCGHSA enrichment
  8. 2026-08-18 13:48 UTCEPSS rescore
  9. 2026-08-18 09:59 UTCGHSA enrichment
  10. 2026-08-17 21:46 UTCEG score recompute
  11. 2026-08-17 21:45 UTCGHSA enrichment
  12. 2026-08-17 13:47 UTCEPSS rescore
  13. 2026-08-17 09:26 UTCGHSA enrichment
  14. 2026-08-16 21:13 UTCEG score recompute
  15. 2026-08-16 21:13 UTCGHSA enrichment
  16. 2026-08-16 14:56 UTCEPSS rescore
  17. 2026-08-16 08:59 UTCEG score recompute
  18. 2026-08-16 08:59 UTCGHSA enrichment
  19. 2026-08-15 20:46 UTCGHSA enrichment
  20. 2026-08-15 08:32 UTCEG score recompute
  21. 2026-08-15 08:32 UTCGHSA enrichment
  22. 2026-08-14 20:18 UTCEG score recompute
  23. 2026-08-14 20:18 UTCGHSA enrichment
  24. 2026-08-14 19:39 UTCEG score recompute
  25. 2026-08-14 19:39 UTCGHSA enrichment
Show 4 more
  1. 2026-08-14 18:35 UTCEG score recompute
  2. 2026-08-14 18:35 UTCGHSA enrichment
  3. 2026-08-14 17:30 UTCEG score recompute
  4. 2026-08-14 17:30 UTCMITRE cvelistV5first tracked

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 in the National Vulnerability Database 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-2026-63361 actively exploited?
CVE-2026-63361 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 76.8% of all scored CVEs.
What is the CVSS score of CVE-2026-63361?
CVE-2026-63361 has a CVSS v3 base score of 8.5 (NVD).
How do I remediate CVE-2026-63361?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-63361, 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

Explore the affected products and dependency analysis for CVE-2026-63361

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