CVE-2026-44657

HIGHNVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.5 under NVD CVSS v3. EPSS exploit probability: 0.3%, top 72% 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
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.6%CVSS: 7.5Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Mantis Bug Tracker (MantisBT) is an open source issue tracker. Prior to 2.28.2, using show_inline=1 parameter and a valid file_show_inline_token CSRF token on file_download.php, an attacker can execute code by uploading a crafted XHTML attachment referencing a JavaScript attachment. This vulnerability is fixed in 2.28.2.

CVSS v3
7.5
EG Score
7.5HIGHmedium confidence
EG Risk
34
EG Risk 34/100

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
Severity75% × 45%
Exploitation0% × 40%
Automatability0% × 15%
EPSS PROB
0.6%
EPSS %ILE
45th
KEV
Not listed

Published

May 28, 2026

Last Modified

July 21, 2026

Advisory Details (4)

Auto-updated May 29, 2026
🔬 Proof of concept available. Patch available. Sources: github_commit, github.
generic Patch Available🟡 PoC Available

0037020: CVE-2026-44657: Stored XSS in File Download - MantisBT

https://mantisbt.org/bugs/view.php?id=37020
github Patch Available

Stored XSS in File Download · Advisory · mantisbt/mantisbt · GitHub

https://github.com/mantisbt/mantisbt/security/advisories/GHSA-p6fr-rxq7-xcg8
github Patch Available

Content Security Policy bypass via attachments · Advisory · mantisbt/mantisbt · GitHub

https://github.com/mantisbt/mantisbt/security/advisories/GHSA-9c3j-xm6v-j7j3
github_commit

commit 26647b2e68ba (mantisbt/mantisbt)

Fix landed in mantisbt/mantisbt commit 26647b2e68ba — awaiting tagged release

https://github.com/mantisbt/mantisbt/commit/26647b2e68ba30b9d7987d4e03d7a16416684bc2

Vendor Advisories for CVE-2026-44657(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Affected Packages

(1 across 1 ecosystem)
Packagist(1)
PackageVulnerable rangeFix by version rangeDependents
mantisbt/mantisbt2.10.0 ... 2.9.1 (76 versions)
  • every version up to 2.28.2: fixed in 2.28.2
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 6× in last 7d / 24× 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 155 total refreshes for this CVE.

  1. 2026-10-05 17:43 UTCEPSS rescore
  2. 2026-10-04 23:22 UTCEPSS rescore
  3. 2026-10-03 15:18 UTCOSV refresh
  4. 2026-10-03 14:25 UTCEPSS rescore
  5. 2026-10-01 19:50 UTCEPSS rescore
  6. 2026-09-30 15:03 UTCEPSS rescore
  7. 2026-09-27 13:48 UTCEPSS rescore
  8. 2026-09-26 15:58 UTCEPSS rescore
  9. 2026-09-23 17:53 UTCEPSS rescore
  10. 2026-09-20 20:15 UTCEPSS rescore
  11. 2026-09-18 19:28 UTCEPSS rescore
  12. 2026-09-17 19:31 UTCEPSS rescore
  13. 2026-09-16 14:08 UTCEPSS rescore
  14. 2026-09-16 05:15 UTCEPSS rescore
  15. 2026-09-14 06:37 UTCEG score recompute
  16. 2026-09-13 16:47 UTCEPSS rescore
  17. 2026-09-13 02:09 UTCOSV refresh
  18. 2026-09-12 15:01 UTCEPSS rescore
  19. 2026-09-11 14:53 UTCEPSS rescore
  20. 2026-09-11 09:37 UTCEPSS rescore
  21. 2026-09-10 09:34 UTCEPSS rescore
  22. 2026-09-08 22:00 UTCEPSS rescore
  23. 2026-09-07 16:01 UTCEPSS rescore
  24. 2026-09-06 13:47 UTCEPSS rescore
  25. 2026-09-04 05:06 UTCEPSS rescore
Show 75 more
  1. 2026-09-02 14:12 UTCEPSS rescore
  2. 2026-09-01 13:54 UTCEPSS rescore
  3. 2026-08-30 19:17 UTCEPSS rescore
  4. 2026-08-30 01:22 UTCEPSS rescore
  5. 2026-08-28 21:41 UTCEPSS rescore
  6. 2026-08-27 14:25 UTCEPSS rescore
  7. 2026-08-26 14:46 UTCEPSS rescore
  8. 2026-08-25 13:49 UTCEPSS rescore
  9. 2026-08-25 04:37 UTCEG score recompute
  10. 2026-08-23 14:25 UTCEG score recompute
  11. 2026-08-23 00:19 UTCEPSS rescore
  12. 2026-08-21 23:49 UTCEPSS rescore
  13. 2026-08-21 15:19 UTCEG score recompute
  14. 2026-08-20 22:55 UTCEPSS rescore
  15. 2026-08-20 10:41 UTCEG score recompute
  16. 2026-08-19 17:04 UTCEPSS rescore
  17. 2026-08-18 13:48 UTCEPSS rescore
  18. 2026-08-17 13:47 UTCEPSS rescore
  19. 2026-08-16 15:09 UTCEG score recompute
  20. 2026-08-16 14:56 UTCEPSS rescore
  21. 2026-08-16 02:31 UTCEG score recompute
  22. 2026-08-16 02:14 UTCEPSS rescore
  23. 2026-08-15 01:30 UTCEPSS rescore
  24. 2026-08-14 00:49 UTCEG score recompute
  25. 2026-08-13 22:00 UTCEPSS rescore
  26. 2026-08-12 20:38 UTCEG score recompute
  27. 2026-08-12 13:51 UTCEPSS rescore
  28. 2026-08-11 22:24 UTCEG score recompute
  29. 2026-08-11 00:03 UTCEG score recompute
  30. 2026-08-11 00:00 UTCEPSS rescore
  31. 2026-08-09 16:23 UTCEG score recompute
  32. 2026-08-09 13:46 UTCEPSS rescore
  33. 2026-08-08 18:09 UTCEG score recompute
  34. 2026-08-08 16:37 UTCEPSS rescore
  35. 2026-08-07 17:15 UTCEG score recompute
  36. 2026-08-06 19:01 UTCEG score recompute
  37. 2026-08-06 13:46 UTCEPSS rescore
  38. 2026-08-05 20:46 UTCEG score recompute
  39. 2026-08-05 19:17 UTCEPSS rescore
  40. 2026-08-04 23:34 UTCEG score recompute
  41. 2026-08-04 15:10 UTCEPSS rescore
  42. 2026-08-04 10:38 UTCEPSS rescore
  43. 2026-08-03 16:05 UTCEG score recompute
  44. 2026-08-03 10:36 UTCEPSS rescore
  45. 2026-08-02 12:35 UTCEG score recompute
  46. 2026-08-02 02:27 UTCEPSS rescore
  47. 2026-08-01 14:21 UTCEG score recompute
  48. 2026-08-01 04:16 UTCEPSS rescore
  49. 2026-07-31 06:11 UTCEG score recompute
  50. 2026-07-30 16:28 UTCEPSS rescore
  51. 2026-07-30 01:30 UTCEPSS rescore
  52. 2026-07-29 12:25 UTCEG score recompute
  53. 2026-07-28 15:36 UTCEPSS rescore
  54. 2026-07-27 14:13 UTCEPSS rescore
  55. 2026-07-27 09:32 UTCEG score recompute
  56. 2026-07-26 14:54 UTCEPSS rescore
  57. 2026-07-26 14:54 UTCEPSS rescore
  58. 2026-07-25 14:18 UTCEPSS rescore
  59. 2026-07-24 14:17 UTCEPSS rescore
  60. 2026-07-23 14:18 UTCEPSS rescore
  61. 2026-07-23 03:15 UTCEG score recompute
  62. 2026-07-22 14:08 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. 2026-07-16 17:03 UTCEPSS rescore
  68. 2026-07-15 16:57 UTCEPSS rescore
  69. 2026-07-15 02:00 UTCEPSS rescore
  70. 2026-07-13 22:30 UTCEPSS rescore
  71. 2026-07-13 06:13 UTCEPSS rescore
  72. 2026-07-12 05:46 UTCEPSS rescore
  73. 2026-07-11 08:27 UTCEPSS rescore
  74. 2026-07-09 19:10 UTCEPSS rescore
  75. 2026-07-08 15:16 UTCEPSS rescore

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Frequently asked(5)

What is CVE-2026-44657?
CVE-2026-44657 is a high vulnerability published on May 28, 2026. Mantis Bug Tracker (MantisBT) is an open source issue tracker. Prior to 2.28.2, using showinline=1 parameter and a valid fileshowinlinetoken CSRF token on file_download.php, an attacker can execute code by uploading a crafted XHTML attachment referencing a JavaScript attachment. This vulnerability…
When was CVE-2026-44657 disclosed?
CVE-2026-44657 was first published on May 28, 2026, with the most recent update on July 21, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-44657 actively exploited?
CVE-2026-44657 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.6% probability of exploitation in the next 30 days (45th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-44657?
CVE-2026-44657 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-44657?
A fix for CVE-2026-44657 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-44657 are linked in the Vendor Advisories panel on this page.

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