CVE-2021-45811

MEDIUMNVD 6.56.5—
EchelonGraph scoreMEDIUM confidence

Score 6.5 from GitHub Security Advisory published 2023-09-08. NVD baseline CVSS 6.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Elevated
6.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 2.5%CVSS: 6.5Exploit: Elevated riskExposed services: Not assessed

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

A SQL injection vulnerability in the "Search" functionality of "tickets.php" page in osTicket 1.15.x allows authenticated attackers to execute arbitrary SQL commands via the "keywords" and "topic_id" URL parameters combination.

CVSS v3
6.5
EG Score
6.5MEDIUMmedium confidence
EG Risk
45
EG Risk 45/100CISA SSVC

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
Severity65% × 45%
Exploitation40% × 40%
Automatability0% × 15%
CISA SSVC: Track at low or medium mission impact; Track* at high (mission-essential systems).
Action: No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines, and watch the vendor's advisory for the fix.
EPSS PROB
2.5%
EPSS %ILE
84th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Track* at high (mission-essential systems).

No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines, and watch the vendor's advisory for the fix.

Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

September 8, 2023

Last Modified

July 9, 2026

Advisory Details (3)

Auto-updated Jul 7, 2026
🔬 Proof of concept available. No fix on record yet.
generic🟡 PoC Available

osTicket, SQL Injection – BackBox.org Membership

https://members.backbox.org/osticket-sql-injection/
generic

osTicket | Support Ticketing System

http://osticket.com
generic

Enhancesoft | Enhance Your Business Today

http://enhancesoft.com

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 7× in last 7d / 28× 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 89 of 164 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. 11 repeat rows among the latest 100 are merged into the row they repeat. The 75 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-10 19:56 UTCEPSS rescoreEPSS 2.5% · 84th percentile
  2. 2026-10-09 20:04 UTCEPSS rescoreEPSS 2.5% · 84th percentile
  3. 2026-10-08 16:40 UTCEPSS rescoreEPSS 2.5% · 84th percentile
  4. 2026-10-07 23:45 UTCEPSS rescoreEPSS 2.5% · 84th percentile
  5. 2026-10-06 15:14 UTCEPSS rescoreEPSS 2.5% · 84th percentile
  6. 2026-10-05 17:40 UTCEPSS rescoreEPSS 2.5% · 84th percentile
  7. 2026-10-04 23:19 UTCEPSS rescoreEPSS 2.5% · 84th percentile
  8. 2026-10-03 14:22 UTCEPSS rescoreEPSS 2.5% · 84th percentile
  9. 2026-10-02 16:23 UTCEPSS rescoreEPSS 2.5% · 84th percentile
  10. 2026-09-30 15:44 UTCEG score recompute
  11. 2026-09-30 15:00 UTCEPSS rescoreEPSS 2.5% · 84th percentile
  12. 2026-09-29 15:15 UTCEPSS rescoreEPSS 2.5% · 84th percentile
  13. 2026-09-28 13:47 UTCEPSS rescoreEPSS 2.5% · 84th percentile
  14. 2026-09-26 15:54 UTCEPSS rescoreEPSS 2.5% · 84th percentile
  15. 2026-09-26 00:21 UTCEPSS rescoreEPSS 2.5% · 84th percentile
  16. 2026-09-24 14:00 UTCEPSS rescoreEPSS 2.5% · 83rd percentile
  17. 2026-09-23 13:45 UTCEPSS rescoreEPSS 2.5% · 83rd percentile
  18. 2026-09-22 23:32 UTCOSV refresh
  19. 2026-09-22 14:44 UTCEPSS rescoreEPSS 2.5% · 83rd percentile
  20. 2026-09-21 20:28 UTCEPSS rescoreEPSS 2.5% · 83rd percentile
  21. 2026-09-20 20:13 UTCEPSS rescoreEPSS 2.5% · 83rd percentile
  22. 2026-09-19 15:38 UTCEPSS rescoreEPSS 2.5% · 83rd percentile
  23. 2026-09-18 19:24 UTCEPSS rescoreEPSS 2.5% · 83rd percentile
  24. 2026-09-17 19:23 UTCEPSS rescoreEPSS 2.5% · 83rd percentile
  25. 2026-09-16 14:05 UTCEPSS rescoreEPSS 2.5% · 83rd percentile
Show 64 more
  1. 2026-09-15 03:06 UTCEPSS rescoreEPSS 2.5% · 83rd percentile
  2. 2026-09-12 14:57 UTCEPSS rescoreEPSS 2.5% · 83rd percentile
  3. 2026-09-11 14:49 UTCEPSS rescoreEPSS 2.5% · 83rd percentile
  4. 2026-09-11 09:33 UTCEPSS rescoreEPSS 2.5% · 83rd percentile
  5. 2026-09-08 21:57 UTCEPSS rescoreEPSS 2.5% · 83rd percentile
  6. 2026-09-07 15:58 UTCEPSS rescoreEPSS 2.5% · 83rd percentile
  7. 2026-09-06 13:45 UTCEPSS rescoreEPSS 2.5% · 83rd percentile
  8. 2026-09-05 15:25 UTCEPSS rescoreEPSS 2.5% · 83rd percentile
  9. 2026-09-04 13:57 UTCEPSS rescoreEPSS 2.5% · 83rd percentile
  10. 2026-09-04 05:03 UTCEPSS rescoreEPSS 2.5% · 83rd percentile
  11. 2026-09-03 18:29 UTCOSV refresh
  12. 2026-09-02 14:09 UTCEPSS rescoreEPSS 2.5% · 83rd percentile
  13. 2026-09-01 13:51 UTCEPSS rescoreEPSS 2.5% · 83rd percentile
  14. 2026-08-30 19:14 UTCEPSS rescoreEPSS 2.5% · 83rd percentile
  15. 2026-08-30 01:19 UTCEPSS rescoreEPSS 2.5% · 83rd percentile
  16. 2026-08-28 21:38 UTCEPSS rescoreEPSS 2.5% · 83rd percentile
  17. 2026-08-27 14:22 UTCEPSS rescoreEPSS 2.5% · 83rd percentile
  18. 2026-08-26 14:43 UTCEPSS rescoreEPSS 2.5% · 83rd percentile
  19. 2026-08-25 13:46 UTCEPSS rescoreEPSS 2.5% · 83rd percentile
  20. 2026-08-24 14:13 UTCEPSS rescoreEPSS 2.5% · 83rd percentile
  21. 2026-08-23 00:16 UTCEPSS rescoreEPSS 2.5% · 83rd percentile
  22. 2026-08-21 23:46 UTCEPSS rescoreEPSS 2.5% · 83rd percentile
  23. 2026-08-20 22:52 UTCEPSS rescoreEPSS 2.5% · 83rd percentile
  24. 2026-08-19 17:01 UTCEPSS rescoreEPSS 2.5% · 83rd percentile
  25. 2026-08-18 13:45 UTCEPSS rescoreEPSS 2.5% · 83rd percentile
  26. 2026-08-17 13:44 UTCEPSS rescoreEPSS 2.5% · 83rd percentile
  27. 2026-08-17 07:31 UTCOSV refresh
  28. 2026-08-16 14:53 UTCEPSS rescoreEPSS 2.5% · 83rd percentile
  29. 2026-08-16 02:11 UTCEPSS rescoreEPSS 2.5% · 83rd percentile
  30. 2026-08-15 01:27 UTCEPSS rescoreEPSS 2.5% · 82nd percentile
  31. 2026-08-13 21:57 UTCEPSS rescoreEPSS 2.5% · 82nd percentile
  32. 2026-08-12 13:48 UTCEPSS rescoreEPSS 2.5% · 82nd percentile
  33. 2026-08-11 13:38 UTCEPSS rescoreEPSS 2.5% · 82nd percentile
  34. 2026-08-09 13:44 UTCEPSS rescoreEPSS 2.5% · 82nd percentile
  35. 2026-08-08 16:33 UTCEPSS rescoreEPSS 2.5% · 82nd percentile
  36. 2026-08-07 16:24 UTCEPSS rescoreEPSS 2.5% · 82nd percentile
  37. 2026-08-06 13:44 UTCEPSS rescoreEPSS 2.5% · 82nd percentile
  38. 2026-08-05 19:14 UTCEPSS rescoreEPSS 2.5% · 82nd percentile
  39. 2026-08-04 10:34 UTCEPSS rescoreEPSS 2.5% · 82nd percentile
  40. 2026-08-03 10:33 UTCEPSS rescoreEPSS 2.5% · 82nd percentile
  41. 2026-08-02 02:30 UTCOSV refresh
  42. 2026-08-02 02:24 UTCEPSS rescoreEPSS 2.5% · 82nd percentile
  43. 2026-08-01 04:13 UTCEPSS rescoreEPSS 2.5% · 82nd percentile
  44. 2026-07-30 16:25 UTCEPSS rescoreEPSS 2.5% · 82nd percentile
  45. 2026-07-30 01:28 UTCEPSS rescoreEPSS 2.5% · 82nd percentile
  46. 2026-07-28 15:33 UTCEPSS rescoreEPSS 2.5% · 82nd percentile
  47. 2026-07-26 14:52 UTCEPSS rescoreEPSS 2.5% · 82nd percentile
  48. 2026-07-25 14:15 UTCEPSS rescoreEPSS 2.5% · 82nd percentile
  49. 2026-07-24 14:15 UTCEPSS rescoreEPSS 2.5% · 82nd percentile
  50. 2026-07-23 14:16 UTCEPSS rescoreEPSS 2.5% · 82nd percentile
  51. 2026-07-23 02:05 UTCEG score recompute
  52. 2026-07-22 22:52 UTCEG score recompute
  53. 2026-07-22 14:06 UTCEPSS rescoreEPSS 2.5% · 82nd percentile
  54. 2026-07-21 15:22 UTCEPSS rescoreEPSS 2.5% · 82nd percentile
  55. 2026-07-20 17:05 UTCEPSS rescoreEPSS 2.5% · 82nd percentile
  56. 2026-07-19 14:29 UTCEPSS rescoreEPSS 2.5% · 82nd percentile
  57. 2026-07-19 02:27 UTCEPSS rescoreEPSS 2.5% · 82nd percentile
  58. 2026-07-18 10:02 UTCEPSS rescoreEPSS 2.5% · 82nd percentile
  59. 2026-07-16 17:00 UTCEPSS rescoreEPSS 2.5% · 82nd percentile
  60. 2026-07-15 16:55 UTCEPSS rescoreEPSS 2.5% · 82nd percentile
  61. 2026-07-15 09:49 UTCOSV refresh
  62. 2026-07-15 01:58 UTCEPSS rescoreEPSS 2.5% · 82nd percentile
  63. 2026-07-13 22:27 UTCEPSS rescoreEPSS 2.5% · 82nd percentile
  64. 2026-07-13 06:11 UTCEPSS rescoreEPSS 2.5% · 82nd percentile

Public detection templates

(1 reference)

A public Nuclei detection template is referenced for this CVE. A detection template checks whether a system is affected; it is not necessarily exploit code.

  • Nucleihttp/cves/2021/CVE-2021-45811.yaml
    Published Oct 15, 2024

    osTicket 1.15.x - SQL Injection

    Open source ↗

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2021-45811?
CVE-2021-45811 is a medium vulnerability published on September 8, 2023. A SQL injection vulnerability in the "Search" functionality of "tickets.php" page in osTicket 1.15.x allows authenticated attackers to execute arbitrary SQL commands via the "keywords" and "topic_id" URL parameters combination.
When was the CVE record for CVE-2021-45811 published?
The CVE record for CVE-2021-45811 was published on September 8, 2023. 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 9, 2026; the record at its source may have been updated since.
Is CVE-2021-45811 actively exploited?
CVE-2021-45811 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 2.5% probability of exploitation in the next 30 days (84th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2021-45811?
CVE-2021-45811 has a CVSS v3 base score of 6.5 (NVD).
How do I remediate CVE-2021-45811?
No fix for CVE-2021-45811 is confirmed yet. Until one is published, restrict network exposure of the affected system or apply the vendor's mitigation — for example, keep it off the internet or limit it to trusted networks — and watch the vendor's advisory for the fix.

Dependency Blast Radius

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