CVE-2026-33741

MEDIUMNVD 6.86.8—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 6.8 under NVD CVSS v3. EPSS exploit probability: 0.2%, top 88% 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, nvd
Elevated
6.8EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.3%CVSS: 6.8Exploit: Elevated riskExposed services: Not assessed

A fix is available — apply it.

EspoCRM is an open source customer relationship management application. Versions 9.3.3 and below allow authenticated users to upload SVG attachments through normal attachment-capable fields and later serve those SVG files as top-level inline documents through both the attachment and image entry points, resulting in stored cross-user XSS reachable through a normal attachment workflow. Although inline SVG script is blocked by the response CSP, the same CSP still allows same-origin external script. As a result, an attacker can upload a malicious SVG together with a second attacker-controlled JavaScript attachment, then trick another user into opening the SVG to execute JavaScript in the victim's EspoCRM origin. This issue has been fixed in version 9.3.4.

CVSS v3
6.8
EG Score
6.8MEDIUMmedium confidence
EG Risk
47
EG Risk 47/100

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
Severity68% × 45%
Exploitation40% × 40%
Automatability0% × 15%
EPSS PROB
0.3%
EPSS %ILE
18th
KEV
Not listed

Published

May 19, 2026

Last Modified

July 24, 2026

Advisory Details (1)

Auto-updated May 20, 2026
🔬 Proof of concept available. Patch available. Sources: github.
github Patch Available🟡 PoC Available

Stored SVG attachment can execute same-origin uploaded JavaScript when opened via image or attachment entry points · Advisory · espocrm/espocrm · GitHub

https://github.com/espocrm/espocrm/security/advisories/GHSA-5wh5-ccv2-m3pv

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 6× in last 7d / 26× 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 179 total refreshes for this CVE.

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

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Frequently asked(5)

What is CVE-2026-33741?
CVE-2026-33741 is a medium vulnerability published on May 19, 2026. EspoCRM is an open source customer relationship management application. Versions 9.3.3 and below allow authenticated users to upload SVG attachments through normal attachment-capable fields and later serve those SVG files as top-level inline documents through both the attachment and image entry…
When was CVE-2026-33741 disclosed?
CVE-2026-33741 was first published on May 19, 2026, with the most recent update on July 24, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-33741 actively exploited?
CVE-2026-33741 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (18th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-33741?
CVE-2026-33741 has a CVSS v3 base score of 6.8 (NVD).
How do I remediate CVE-2026-33741?
A fix for CVE-2026-33741 is available: update to the fixed version the vendor names in its advisory.

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