CVE-2025-48940

HIGHNVD 7.27.2
EchelonGraph scoreMEDIUM confidence

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

This high-severity CVE scores 7.2 under NVD CVSS v3. EPSS exploit probability: 0.6% (47th percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.

Triggered by: Headline CVSS from NVD CVSS v3
Sources: EPSS, NVD CVSS v3

Also known asEUVD-2025-16668 (ENISA EUVD)Source: ENISA EUVD

7.2EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines (the SSVC decision on this page).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.6%CVSS: 7.2Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

MyBB is free and open source forum software. Prior to version 1.8.39, the upgrade component does not validate user input properly, which allows attackers to perform local file inclusion (LFI) via a specially crafted parameter value. In order to exploit the vulnerability, the installer must be unlocked (no install/lock file present) and the upgrade script must be accessible (by re-installing the forum via access to install/index.php; when the forum has not yet been installed; or the attacker is authenticated as a forum administrator). MyBB 1.8.39 resolves this issue.

CVSS v3
7.2
EG Score
7.2HIGHmedium confidence
EG Risk
33
EG Risk 33/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity72% × 45%
Impact severity (EG Severity): CVSS 7.2 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.6% × 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: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.6%
EPSS %ILE
47th
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (7.2): severity, escalated by confirmed exploitation. This CVE's 7.2 is its impact severity (EG Severity), not escalated.

EG Severity
7.2 HIGHCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.NVD CVSS v3 · CVSS v3.0 or v3.1
EG Likelihood
0.6% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-11-12). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track at medium mission impactTrack at every mission impact level.CISA BOD 26-04: 60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.

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

A fix is available. Apply it within your standard update timelines.

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.

The score's inputs: 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

June 2, 2025

Last Modified

July 2, 2025

Advisory Details (3)

Auto-updated Oct 24, 2026
Patch available. Sources: github_commit, github.
Web page

Version 1.8.39 - MyBB

https://mybb.com/versions/1.8.39
GitHub advisoryMentions a patch (unverified)

Upgrade local file inclusion · Advisory · mybb/mybb · GitHub

https://github.com/mybb/mybb/security/advisories/GHSA-q4jv-xwjx-37cp
GitHub commit Patch Available

commit 6e6cfbd524d9 (mybb/mybb)

Patch available: mybb/mybb mybb_1839 (contains commit 6e6cfbd524d9)

https://github.com/mybb/mybb/commit/6e6cfbd524d9101b51e1278ecf520479b64b0f00

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 7× in last 7d / 30× 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 its CVE.org record (CNA or CISA ADP). 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). "EchelonGraph re-scored" is our own recompute of this CVE's score, not an update from a source, and is not counted in the refreshes above. Most recent first.

Showing the most recent 100 of 220 rows on record for this CVE, as 95 entries (5 repeats merged).

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. 5 repeat rows among the latest 100 are merged into the row they repeat. The 120 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-13 01:26 UTCEchelonGraph re-scored
  2. 2026-11-12 16:32 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  3. 2026-11-11 16:36 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  4. 2026-11-10 16:40 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  5. 2026-11-09 16:33 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  6. 2026-11-08 16:37 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  7. 2026-11-07 16:36 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  8. 2026-11-06 16:47 UTCEchelonGraph re-scored
  9. 2026-11-06 16:34 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  10. 2026-11-05 16:35 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  11. 2026-11-04 16:33 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  12. 2026-11-03 16:44 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  13. 2026-11-02 16:43 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  14. 2026-11-01 16:33 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  15. 2026-10-31 16:31 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  16. 2026-10-31 08:08 UTCEchelonGraph re-scored
  17. 2026-10-30 16:32 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  18. 2026-10-29 16:31 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  19. 2026-10-28 16:30 UTCEPSS rescoreEPSS 0.5% · 45th percentile
  20. 2026-10-27 16:30 UTCEPSS rescoreEPSS 0.5% · 45th percentile
  21. 2026-10-26 16:30 UTCEPSS rescoreEPSS 0.5% · 45th percentile
  22. 2026-10-25 16:31 UTCEPSS rescoreEPSS 0.5% · 45th percentile
  23. 2026-10-25 16:21 UTCEchelonGraph re-scored
  24. 2026-10-24 23:28 UTCEchelonGraph re-scored
  25. 2026-10-24 16:31 UTCEPSS rescoreEPSS 0.5% · 44th percentile
Show 70 more
  1. 2026-10-23 16:30 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  2. 2026-10-22 16:33 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  3. 2026-10-21 16:31 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  4. 2026-10-20 16:31 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  5. 2026-10-19 16:31 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  6. 2026-10-18 16:31 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  7. 2026-10-18 05:29 UTCEchelonGraph re-scored
  8. 2026-10-17 16:33 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  9. 2026-10-16 16:38 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  10. 2026-10-15 16:31 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  11. 2026-10-14 16:31 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  12. 2026-10-13 16:32 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  13. 2026-10-12 17:01 UTCEchelonGraph re-scored
  14. 2026-10-12 16:33 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  15. 2026-10-11 20:34 UTCEchelonGraph re-scored
  16. 2026-10-11 18:45 UTCEchelonGraph re-scored
  17. 2026-10-11 15:21 UTCEchelonGraph re-scored
  18. 2026-10-11 13:47 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  19. 2026-10-10 19:59 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  20. 2026-10-09 20:06 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  21. 2026-10-08 17:10 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  22. 2026-10-07 23:47 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  23. 2026-10-06 15:17 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  24. 2026-10-05 17:42 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  25. 2026-10-04 23:21 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  26. 2026-10-03 14:24 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  27. 2026-10-02 12:41 UTCOSV refresh
  28. 2026-10-01 19:49 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  29. 2026-09-30 15:02 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  30. 2026-09-28 13:50 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  31. 2026-09-27 13:45 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  32. 2026-09-26 15:58 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  33. 2026-09-26 00:25 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  34. 2026-09-24 14:02 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  35. 2026-09-23 13:47 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  36. 2026-09-21 21:06 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  37. 2026-09-20 20:15 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  38. 2026-09-18 19:27 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  39. 2026-09-17 19:29 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  40. 2026-09-16 14:07 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  41. 2026-09-15 03:09 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  42. 2026-09-13 10:54 UTCOSV refresh
  43. 2026-09-12 15:00 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  44. 2026-09-11 14:52 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  45. 2026-09-11 09:36 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  46. 2026-09-10 09:34 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  47. 2026-09-08 21:59 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  48. 2026-09-07 16:00 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  49. 2026-09-06 13:46 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  50. 2026-09-05 15:28 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  51. 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  52. 2026-09-02 14:11 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  53. 2026-09-01 13:53 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  54. 2026-09-01 04:38 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  55. 2026-08-30 19:16 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  56. 2026-08-30 01:21 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  57. 2026-08-28 21:40 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  58. 2026-08-27 14:24 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  59. 2026-08-26 14:45 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  60. 2026-08-25 13:48 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  61. 2026-08-25 11:41 UTCOSV refresh
  62. 2026-08-24 14:16 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  63. 2026-08-24 09:22 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  64. 2026-08-23 00:18 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  65. 2026-08-21 23:48 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  66. 2026-08-20 22:54 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  67. 2026-08-19 17:03 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  68. 2026-08-18 13:47 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  69. 2026-08-17 13:46 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  70. 2026-08-16 14:55 UTCEPSS rescoreEPSS 0.5% · 39th percentile

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Frequently asked(5)

What is CVE-2025-48940?
CVE-2025-48940 is a high-severity vulnerability; its CVE record was published on June 2, 2025. MyBB is free and open source forum software. Prior to version 1.8.39, the upgrade component does not validate user input properly, which allows attackers to perform local file inclusion (LFI) via a specially crafted parameter value. In order to exploit the vulnerability, the installer must be…
When was the CVE record for CVE-2025-48940 published?
The CVE record for CVE-2025-48940 was published on June 2, 2025. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of July 2, 2025; the record at its source may have been updated since.
Is CVE-2025-48940 actively exploited?
CVE-2025-48940 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.6% probability of exploitation in the next 30 days (47th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2025-48940?
CVE-2025-48940 has a CVSS v3 base score of 7.2 (NVD).
How do I remediate CVE-2025-48940?
A fix for CVE-2025-48940 is available: update to the fixed version the vendor names in its advisory.

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