CVE-2026-81931

MEDIUMPre-NVD 4.84.8
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to the CVSS score beside it.

This medium-severity CVE scores 4.8 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.5% (40th percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.

Triggered by: Headline CVSS from a secondary CVSS source
Sources: EPSS, a secondary CVSS source
Trending — 3 sources updated this week
4.8EG
EchelonGraph verdictMonitorRemediate within your standard update timelines (the SSVC decision on this page).
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.5%CVSS: 4.8Exploit: None knownExposed services: Not assessed

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

Unrestricted Upload of File with Dangerous Type in the product photo upload in Roskus Prospero Flow CRM before 5.16.0 allows an authenticated user holding the create product permission (routine Seller role) to execute arbitrary JavaScript in the application origin. The photo validation rule classifies the file only by its content (magic bytes) and rejects only a fixed list of PHP extensions, while ProductSaveController::save() names the stored file using the client-supplied extension and copies it into the public web root. A file that begins with an image header and carries an HTML extension passes validation, is stored under public/asset/upload/product/, and is served with a text/html content type, turning the upload into first-party stored script execution.

CVSS v3
4.8
EG Score
4.8MEDIUMmedium confidence
EG Risk
22
EG Risk 22/100

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 (value × EchelonGraph’s weight)
Severity48% × 45%
The EG Score, 4.8 of 10.
Exploitation0.5% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at every mission impact level.
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
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 until it ships, then apply the release.
EPSS PROB
0.5%
EPSS %ILE
40th
KEV
Not listed

SSVC (CISA's decision table, applied by EchelonGraph)Track at every mission impact level.

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 until it ships, then apply the release.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

August 27, 2026

Last Modified

September 1, 2026

Advisory Details (2)

Auto-updated Aug 27, 2026
Upstream fix merged — awaiting tagged release. Sources: github_commit.
Web page

CVE-2026-81931 · Unrestricted upload of file with dangerous type in Prospero Flow CRM product photo allows stored cross-site scripting | Vulnerabilities published by Secur0

https://secur0.com/en/cna/cve-list/cve-2026-81931-unrestricted-upload-product-photo-extension-confusion-xss
GitHub commit

commit 71b20e1a37f4 (Roskus/prospero-flow-crm)

Fix landed in Roskus/prospero-flow-crm commit 71b20e1a37f4 — awaiting tagged release

https://github.com/Roskus/prospero-flow-crm/commit/71b20e1a37f4381d1b8b0a6933a942324e1cc19f

Vendor Advisories for CVE-2026-81931(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 19× in last 7d / 80× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 97 of 131 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. 3 repeat rows among the latest 100 are merged into the row they repeat. The 34 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-13 16:35 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  2. 2026-10-12 16:35 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  3. 2026-10-12 14:56 UTCEG score recompute
  4. 2026-10-11 19:20 UTCEG score recompute
  5. 2026-10-11 16:36 UTCEG score recompute
  6. 2026-10-11 13:54 UTCEG score recompute
  7. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  8. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  9. 2026-10-10 05:37 UTCEG score recompute
  10. 2026-10-10 05:37 UTCGHSA enrichmentGHSA-2g3f-q348-c747
  11. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  12. 2026-10-09 07:12 UTCEG score recompute
  13. 2026-10-09 07:12 UTCGHSA enrichmentGHSA-2g3f-q348-c747
  14. 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  15. 2026-10-08 08:19 UTCEG score recompute
  16. 2026-10-08 08:18 UTCGHSA enrichmentGHSA-2g3f-q348-c747
  17. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  18. 2026-10-07 10:02 UTCEG score recompute
  19. 2026-10-07 10:02 UTCGHSA enrichmentGHSA-2g3f-q348-c747
  20. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  21. 2026-10-06 11:46 UTCEG score recompute
  22. 2026-10-06 11:46 UTCGHSA enrichmentGHSA-2g3f-q348-c747
  23. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  24. 2026-10-05 13:28 UTCEG score recompute
  25. 2026-10-05 13:28 UTCGHSA enrichmentGHSA-2g3f-q348-c747
Show 72 more
  1. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  2. 2026-10-04 14:54 UTCGHSA enrichmentGHSA-2g3f-q348-c747
  3. 2026-10-03 16:38 UTCEG score recompute
  4. 2026-10-03 16:38 UTCGHSA enrichmentGHSA-2g3f-q348-c747
  5. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  6. 2026-10-02 18:21 UTCEG score recompute
  7. 2026-10-02 18:21 UTCGHSA enrichmentGHSA-2g3f-q348-c747
  8. 2026-10-02 17:57 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  9. 2026-10-01 19:52 UTCEG score recompute
  10. 2026-10-01 19:52 UTCGHSA enrichmentGHSA-2g3f-q348-c747
  11. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  12. 2026-09-30 19:53 UTCEG score recompute
  13. 2026-09-30 19:53 UTCGHSA enrichmentGHSA-2g3f-q348-c747
  14. 2026-09-30 15:04 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  15. 2026-09-29 14:14 UTCEG score recompute
  16. 2026-09-29 14:14 UTCGHSA enrichmentGHSA-2g3f-q348-c747
  17. 2026-09-28 14:57 UTCEG score recompute
  18. 2026-09-28 14:57 UTCGHSA enrichmentGHSA-2g3f-q348-c747
  19. 2026-09-28 13:52 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  20. 2026-09-27 16:40 UTCEG score recompute
  21. 2026-09-27 16:40 UTCGHSA enrichmentGHSA-2g3f-q348-c747
  22. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  23. 2026-09-26 18:24 UTCEG score recompute
  24. 2026-09-26 18:24 UTCGHSA enrichmentGHSA-2g3f-q348-c747
  25. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  26. 2026-09-25 07:20 UTCEG score recompute
  27. 2026-09-25 07:20 UTCGHSA enrichmentGHSA-2g3f-q348-c747
  28. 2026-09-24 14:04 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  29. 2026-09-24 09:04 UTCEG score recompute
  30. 2026-09-24 09:04 UTCGHSA enrichmentGHSA-2g3f-q348-c747
  31. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  32. 2026-09-23 10:48 UTCEG score recompute
  33. 2026-09-23 10:48 UTCGHSA enrichmentGHSA-2g3f-q348-c747
  34. 2026-09-22 16:01 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  35. 2026-09-22 12:16 UTCEG score recompute
  36. 2026-09-22 12:16 UTCGHSA enrichmentGHSA-2g3f-q348-c747
  37. 2026-09-21 21:09 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  38. 2026-09-21 13:59 UTCEG score recompute
  39. 2026-09-21 13:59 UTCGHSA enrichmentGHSA-2g3f-q348-c747
  40. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  41. 2026-09-20 15:43 UTCGHSA enrichmentGHSA-2g3f-q348-c747
  42. 2026-09-19 17:27 UTCEG score recompute
  43. 2026-09-19 17:27 UTCGHSA enrichmentGHSA-2g3f-q348-c747
  44. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  45. 2026-09-18 19:11 UTCGHSA enrichmentGHSA-2g3f-q348-c747
  46. 2026-09-17 20:54 UTCEG score recompute
  47. 2026-09-17 20:54 UTCGHSA enrichmentGHSA-2g3f-q348-c747
  48. 2026-09-16 20:10 UTCEG score recompute
  49. 2026-09-16 20:10 UTCGHSA enrichmentGHSA-2g3f-q348-c747
  50. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  51. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  52. 2026-09-15 21:54 UTCEG score recompute
  53. 2026-09-15 21:54 UTCGHSA enrichmentGHSA-2g3f-q348-c747
  54. 2026-09-15 03:12 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  55. 2026-09-14 23:38 UTCGHSA enrichmentGHSA-2g3f-q348-c747
  56. 2026-09-14 00:56 UTCEG score recompute
  57. 2026-09-14 00:56 UTCGHSA enrichmentGHSA-2g3f-q348-c747
  58. 2026-09-13 02:40 UTCEG score recompute
  59. 2026-09-13 02:40 UTCGHSA enrichmentGHSA-2g3f-q348-c747
  60. 2026-09-12 04:24 UTCEG score recompute
  61. 2026-09-12 04:24 UTCGHSA enrichmentGHSA-2g3f-q348-c747
  62. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  63. 2026-09-11 06:08 UTCEG score recompute
  64. 2026-09-11 06:08 UTCGHSA enrichmentGHSA-2g3f-q348-c747
  65. 2026-09-10 07:50 UTCGHSA enrichmentGHSA-2g3f-q348-c747
  66. 2026-09-09 09:34 UTCEG score recompute
  67. 2026-09-09 09:34 UTCGHSA enrichmentGHSA-2g3f-q348-c747
  68. 2026-09-08 22:01 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  69. 2026-09-08 11:17 UTCEG score recompute
  70. 2026-09-08 11:17 UTCGHSA enrichmentGHSA-2g3f-q348-c747
  71. 2026-09-07 12:06 UTCGHSA enrichmentGHSA-2g3f-q348-c747
  72. 2026-09-06 13:49 UTCEG score recompute

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-81931?
CVE-2026-81931 is a medium-severity vulnerability; its CVE record was published on August 27, 2026. Unrestricted Upload of File with Dangerous Type in the product photo upload in Roskus Prospero Flow CRM before 5.16.0 allows an authenticated user holding the create product permission (routine Seller role) to execute arbitrary JavaScript in the application origin. The photo validation rule…
When was CVE-2026-81931 made public?
CVE-2026-81931 was made public on August 27, 2026: that is the date its CVE record's CNA, Secur0, gives for when the vulnerability was made public. The CVE record itself was published on August 27, 2026. EchelonGraph's copy of the record carries a last-modified date of September 1, 2026; the record at its source may have been updated since.
Is CVE-2026-81931 actively exploited?
CVE-2026-81931 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.5% probability of exploitation in the next 30 days (40th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-81931?
CVE-2026-81931 has a CVSS base score of 4.8 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-81931?
An upstream fix for CVE-2026-81931 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-2026-81931 are linked in the Vendor Advisories panel on this page.

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