vciy

CVE-2023-40931

INDEX BUILT · 2026-09-20

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A SQL injection vulnerability in Nagios XI from version 5.11.0 up to and including 5.11.1 allows authenticated attackers to execute arbitrary SQL…

CVE-2023-409313 of 4 sources documented this
35

rank 35 = 17 + 16 + 0 + 2 + 0

rank@v1 · scheduled

Someone is already using it

CISA KEV catalog · public proof-of-concept · FIRST EPSS

EPSS 0.11278  ·  without this subject the record ranks 18

What it costs you if it fires

NVD CVSS base score, then the CNA's own

CVSS 6.5, from NVD  ·  without this subject the record ranks 19

It is getting worse, not staying still

FIRST EPSS series, rescorings and bad loads removed

no persisting rise in 365 days  ·  without this subject the record ranks 35

How much of the world it touches

NVD CPE configurations

1 product in the CPE ranges  ·  without this subject the record ranks 33

Someone else already set the date

CISA KEV remediation due date

no CISA due date  ·  without this subject the record ranks 35

Unaudited dollar value2 of 3 inputs carry a receipt
Exposure$344,000over the next 30 days, if this record is yours
Movement+$172,000on 2025-01-06, the last material move, 1 year, 6 months before this reading
Basisassumeda published average, not your estate

$344,000 = $4.99M incident cost x 0.6121449559255632 exposure x 0.11278 likelihood

udv@v1 · unaudited · wrong for you until you say what you run

$4.99M is the cost of a breach that happened, from IBM Cost of a Data Breach Report 2026, global average. It is not the value of any asset of yours. That average already covers breaches of every severity, so scaling it by exposure understates a partial-impact record. That is an assumption, not a measurement. Your own asset value goes in the decision record.

Hindsight · the state

0.11278EPSSNOT IN KEVas of 2026-09-20
Severity6.5 MEDIUMreceipt
Harmpartial impactreceipt
Exploitationpublic proof-of-conceptreceipt
Defenseunaffected versions publishedreceipt
Movementdoubled within 72hreceipt
PLATEAU10Minimal movement since 2026-06-15, 24 days at 0.11, as of 2026-07-09. arc-rules@v1

Foresight · where to check next

SonicWall SMA100WordPressFortinetProgress SoftwareCVE-2023-3436240931

This record is one instance of CWE-89, improper neutralization of special elements used in an sql command ('sql injection'). The index holds 20889 prior instances of this class, 31 KEV-listed. The nearest of its KEV-listed records are drawn beside this. taxonomy@v1

Full pattern panel

Prior records in this weakness class. Each is its own record, dated and receipted.
Color is a claim, not decoration:the hostile worldthe defenseno signalspoke length is how much of the record matches, not how bad it is

Check a version against this record

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Harm, if it fires from the vector and the weakness

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Reachnetwork-reachable · low privileges required · no user interaction · low attack complexityreceipt
ImpactComplete confidentiality lossreceipt
Scored fromCVSS v3.1 · NVD's vectorreceipt
Weakness classCWE-89 Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')receipt
Published consequencesCWE-89: Confidentiality, Integrity, Availability: Execute Unauthorized Code or Commands; Confidentiality: Read Application Data; Authentication: Gain Privileges or Assume Identity, Bypass Protection…[email protected]

CISA KEV & Federal Remediation Deadline from the record and CISA

The fix, and how long it's been waiting.

First unaffected version, by branchxi 5.11.2receipt
Patch available sinceNo dated patch-availability record in held sources. The index holds reference URLs without dates and only the current revision of the CVE record, so the day a fix first existed cannot be derived. Only the versions it landed in.

Exploit Status & Known PoCs a ladder, not a score

Current rung: Proof-of-concept published · 3 public repositories, 2024-04-27.

  • RUNG 1Nothing observed in held sources
  • RUNG 2Proof-of-concept published · 3 public repositories2024-04-27receipt
  • RUNG 3Exploited in the wild · CISA KEV listed
  • RUNG 4Ransomware campaign use known

Authority who says so

CVSS, NVD6.5 MEDIUMreceipt
Exploit probability0.11278 · top 4% of all CVEsreceipt
Blast breadth1 product across 1 vendorderived
Assigned bymitrereceipt
Recorded changes61 · last 19 Sep 2026derived

Affected & Fixed Versions as published

Named in the CPE rangesNagios xireceipt
Published rangesnagios xi >= 5.11.0 < 5.11.2receipt

A rung lights from a row in the index, never from an assessment. "Held sources" is the true scope of the claim: this index reads the CVE record, NVD, CISA KEV, FIRST's EPSS and public proof-of-concept repositories, and it does not observe attacks.

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What it is stated by the CNA

A SQL injection vulnerability in Nagios XI from version 5.11.0 up to and including 5.11.1 allows authenticated attackers to execute arbitrary SQL commands via the ID parameter in the POST request to /nagiosxi/admin/banner_message-ajaxhelper.php receipt

NVD's analysis a second authority

severity
6.5 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
weakness
CWE-89
affected versions
nagios xi >= 5.11.0 < 5.11.2

check it yourself nagios.com outpost24.com receipt

Dated events

2024-12-17EPSS moved 0.05 to 0.132026-06-15EPSS moved 0.85 to 0.13

Movement the material steps

20 Sep 20230.00045
17 Dec 20240.12776 · crossed 0.10
31 Dec 20240.09604 · crossed 0.10
6 Jan 20250.15237 · crossed 0.10
16 Feb 20250.25951
17 Mar 20250.79514 · crossed 0.50 · scoring model v2025.03.14
15 Jun 20260.13484 · crossed 0.50 · scoring model v2026.06.15
9 Jul 20260.11278

This score more than doubled inside 72 hours. Both observations are in the full history below.

Show all 58 observations
20 Sep 20230.00045
22 Sep 20230.00085
19 Aug 20240.00092
25 Sep 20240.00208
25 Oct 20240.03195
2 Nov 20240.02894
28 Nov 20240.02930
11 Dec 20240.04636
17 Dec 20240.12776
31 Dec 20240.09604
6 Jan 20250.15237
20 Jan 20250.18833
16 Feb 20250.25951
1 Mar 20250.24560
14 Mar 20250.26707
17 Mar 20250.79514
18 Mar 20250.81229
19 Mar 20250.79514
20 Mar 20250.81229
23 Mar 20250.79514
24 Mar 20250.81229
27 Mar 20250.79514
28 Mar 20250.81229
29 Mar 20250.80269
30 Mar 20250.81229
15 Apr 20250.84091
25 Apr 20250.86716
26 Apr 20250.87184
15 May 20250.86716
19 May 20250.8774
23 May 20250.88428
29 May 20250.87929
19 Jun 20250.8791
22 Jun 20250.8729
15 Jul 20250.87907
20 Jul 20250.88021
12 Aug 20250.88475
26 Aug 20250.8865
1 Sep 20250.8821
8 Sep 20250.87888
22 Sep 20250.87473
24 Sep 20250.87983
20 Oct 20250.85843
18 Nov 20250.81229
21 Nov 20250.85843
1 Jan 20260.86844
14 Jan 20260.88322
8 Feb 20260.88305
14 Mar 20260.88021
12 Apr 20260.88305
21 Apr 20260.86208
28 Apr 20260.88305
14 May 20260.8844
30 May 20260.87753
6 Jun 20260.84148
14 Jun 20260.84849
15 Jun 20260.13484
9 Jul 20260.11278

58 observations held. A highlighted step crossed a promotion threshold. A step marked with a scoring model moved because the instrument was replaced, not because the vulnerability changed. receipt

The full biography

EPSS 0.11278Published2023-09-19Public PoC2024-04-27Index as of2026-07-09

Exploit probability more than doubled between 2025-03-14 and 2025-03-17 (0.26707 → 0.79514) and the record had been public for 2 years, 9 months when this index was last written.

Published 2023-09-19 receipt · Public PoC 2024-04-27 receipt · Index as of 2026-07-09 derived

The pattern, elsewhere

This record is one instance of CWE-89, improper neutralization of special elements used in an sql command ('sql injection'). The index holds 20889 prior instances of this class, 31 KEV-listed. The nearest of its KEV-listed records are drawn beside this. [email protected]

CVE-2019-7481 · SonicWall SMA100matches 7 of 8KEV listed · 2019receipt
CVE-2026-60137 · WordPressmatches 6 of 8KEV listed · 2026receipt
CVE-2023-48788 · Fortinet FortiClientEMSmatches 5 of 8KEV listed · 2024receipt
CVE-2024-6670 · Progress Software Corporation WhatsUp Goldmatches 5 of 8KEV listed · 2024receipt
CVE-2023-34362matches 5 of 8KEV listed · 2023receipt
CVE-2021-20016 · SonicWall SMA100matches 5 of 8KEV listed · 2021receipt

"Matches n of m" counts the attributes the two records can both be compared on: the CVSS metrics they share a version of, any weakness class beyond this one, and the vendor. fit-rules@v1

20889 records in this class held. The six above are drawn from the ones CISA has listed as exploited, ranked by how much of the record matches this one. That is why every one of them is KEV-listed: the pool is, so the colour on those spokes says nothing the pool has not already said.

No curated product neighbourhood is held for this product, so the records above are the nearest this index can name. The neighbourhood table covers a small set of products and is extended by hand.

Siblings and hubs

Records related to this one

Fixed with these, by one advisory

Of the 4 records in this advisory, this is the only one with public proof-of-concept code, and it holds 3 references to it.

Listed because one advisory covers them, not because they are the same defect. Each record's own state is on its own page.

Grouping: held values

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What usually comes next

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