CVE-2026-82657

HIGHPre-NVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-08-30. A secondary CVSS source baseline 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this weekElevated
7.5EG
EchelonGraph verdictPlan mitigationSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.5%CVSS: 7.5Exploit: Elevated riskExposed services: Not assessed

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

Admidio before 5.0.12 fails to enforce login-only module restrictions in RSS feed endpoints for forum and announcements modules. Unauthenticated attackers can retrieve forum topics and announcements by sending GET requests to rss/forum.php or rss/announcements.php, disclosing titles, full post text, author names, and timestamps.

CVSS v3
7.5
EG Score
7.5HIGHmedium confidence
EG Risk
65
EG Risk 65/100CISA 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
Severity75% × 45%
Exploitation40% × 40%
Automatability100% × 15%
CISA SSVC: Track at low or medium mission impact; Attend 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 at low or medium mission impact and sooner than that at high, and watch the vendor's advisory for the fix.
EPSS PROB
0.5%
EPSS %ILE
37th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Attend 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 at low or medium mission impact and sooner than that at high, and watch the vendor's advisory for the fix.

Exploitation public PoC (CISA Vulnrichment) · Automatable yes (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

August 30, 2026

Last Modified

August 31, 2026

Advisory Details (2)

Auto-updated Aug 30, 2026
🔬 Proof of concept available. No fix on record yet. Sources: github.
generic

Admidio before 5.0.12 Authentication Bypass via RSS feeds | Advisories | VulnCheck

https://www.vulncheck.com/advisories/admidio-before-5.0.12-authentication-bypass-via-rss-feeds
githubMentions a patch (unverified)🟡 PoC Available

RSS feeds leak forum posts in login-only mode · Advisory · Admidio/admidio · GitHub

https://github.com/Admidio/admidio/security/advisories/GHSA-mg9h-42f8-2pmm

Vendor Advisories for CVE-2026-82657(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 23× in last 7d / 105× 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 149 total refreshes for this CVE.

  1. 2026-10-10 20:00 UTCEPSS rescore
  2. 2026-10-10 14:02 UTCGHSA enrichment
  3. 2026-10-10 00:44 UTCEG score recompute
  4. 2026-10-10 00:44 UTCGHSA enrichment
  5. 2026-10-09 20:07 UTCEPSS rescore
  6. 2026-10-09 02:31 UTCEG score recompute
  7. 2026-10-09 02:31 UTCGHSA enrichment
  8. 2026-10-08 17:13 UTCEPSS rescore
  9. 2026-10-08 00:43 UTCEG score recompute
  10. 2026-10-08 00:42 UTCGHSA enrichment
  11. 2026-10-07 23:48 UTCEPSS rescore
  12. 2026-10-07 03:01 UTCEG score recompute
  13. 2026-10-07 03:01 UTCGHSA enrichment
  14. 2026-10-06 15:18 UTCEPSS rescore
  15. 2026-10-06 13:53 UTCGHSA enrichment
  16. 2026-10-06 00:47 UTCEG score recompute
  17. 2026-10-06 00:47 UTCGHSA enrichment
  18. 2026-10-05 17:43 UTCEPSS rescore
  19. 2026-10-05 08:43 UTCEG score recompute
  20. 2026-10-05 08:43 UTCGHSA enrichment
  21. 2026-10-04 23:22 UTCEPSS rescore
  22. 2026-10-04 19:35 UTCGHSA enrichment
  23. 2026-10-04 04:19 UTCGHSA enrichment
  24. 2026-10-03 15:12 UTCEG score recompute
  25. 2026-10-03 15:12 UTCGHSA enrichment
Show 75 more
  1. 2026-10-03 14:26 UTCEPSS rescore
  2. 2026-10-03 01:56 UTCEG score recompute
  3. 2026-10-03 01:56 UTCGHSA enrichment
  4. 2026-10-02 17:57 UTCEPSS rescore
  5. 2026-10-02 12:49 UTCGHSA enrichment
  6. 2026-10-01 22:31 UTCEG score recompute
  7. 2026-10-01 22:30 UTCGHSA enrichment
  8. 2026-10-01 19:50 UTCEPSS rescore
  9. 2026-10-01 08:53 UTCGHSA enrichment
  10. 2026-09-30 19:47 UTCEG score recompute
  11. 2026-09-30 19:47 UTCGHSA enrichment
  12. 2026-09-30 15:04 UTCEPSS rescore
  13. 2026-09-30 03:47 UTCEG score recompute
  14. 2026-09-30 03:47 UTCGHSA enrichment
  15. 2026-09-29 14:35 UTCGHSA enrichment
  16. 2026-09-29 01:28 UTCEG score recompute
  17. 2026-09-29 01:28 UTCGHSA enrichment
  18. 2026-09-28 13:52 UTCEPSS rescore
  19. 2026-09-28 12:21 UTCGHSA enrichment
  20. 2026-09-27 23:14 UTCEG score recompute
  21. 2026-09-27 23:14 UTCGHSA enrichment
  22. 2026-09-27 13:48 UTCEPSS rescore
  23. 2026-09-27 10:07 UTCGHSA enrichment
  24. 2026-09-26 21:00 UTCEG score recompute
  25. 2026-09-26 21:00 UTCGHSA enrichment
  26. 2026-09-26 15:59 UTCEPSS rescore
  27. 2026-09-26 07:52 UTCEG score recompute
  28. 2026-09-26 07:52 UTCGHSA enrichment
  29. 2026-09-25 13:32 UTCGHSA enrichment
  30. 2026-09-25 00:12 UTCEG score recompute
  31. 2026-09-25 00:12 UTCGHSA enrichment
  32. 2026-09-24 14:04 UTCEPSS rescore
  33. 2026-09-24 10:51 UTCGHSA enrichment
  34. 2026-09-23 21:44 UTCEG score recompute
  35. 2026-09-23 21:44 UTCGHSA enrichment
  36. 2026-09-23 17:54 UTCEPSS rescore
  37. 2026-09-23 08:37 UTCGHSA enrichment
  38. 2026-09-22 19:31 UTCEG score recompute
  39. 2026-09-22 19:31 UTCGHSA enrichment
  40. 2026-09-22 16:01 UTCEPSS rescore
  41. 2026-09-22 06:23 UTCEG score recompute
  42. 2026-09-22 06:23 UTCGHSA enrichment
  43. 2026-09-21 21:09 UTCEPSS rescore
  44. 2026-09-21 17:16 UTCGHSA enrichment
  45. 2026-09-21 03:49 UTCEG score recompute
  46. 2026-09-21 03:49 UTCGHSA enrichment
  47. 2026-09-20 20:16 UTCEPSS rescore
  48. 2026-09-20 14:42 UTCGHSA enrichment
  49. 2026-09-20 01:32 UTCEG score recompute
  50. 2026-09-20 01:32 UTCGHSA enrichment
  51. 2026-09-19 12:25 UTCGHSA enrichment
  52. 2026-09-18 23:18 UTCEG score recompute
  53. 2026-09-18 23:18 UTCGHSA enrichment
  54. 2026-09-18 19:28 UTCEPSS rescore
  55. 2026-09-18 10:12 UTCGHSA enrichment
  56. 2026-09-17 21:05 UTCEG score recompute
  57. 2026-09-17 21:05 UTCGHSA enrichment
  58. 2026-09-17 07:56 UTCGHSA enrichment
  59. 2026-09-16 18:49 UTCEG score recompute
  60. 2026-09-16 18:48 UTCGHSA enrichment
  61. 2026-09-16 14:08 UTCEPSS rescore
  62. 2026-09-16 05:15 UTCEPSS rescore
  63. 2026-09-16 05:09 UTCGHSA enrichment
  64. 2026-09-15 16:02 UTCEG score recompute
  65. 2026-09-15 16:02 UTCGHSA enrichment
  66. 2026-09-15 03:12 UTCEPSS rescore
  67. 2026-09-15 03:12 UTCEPSS rescore
  68. 2026-09-15 02:55 UTCGHSA enrichment
  69. 2026-09-14 13:47 UTCGHSA enrichment
  70. 2026-09-14 00:40 UTCEG score recompute
  71. 2026-09-14 00:40 UTCGHSA enrichment
  72. 2026-09-13 11:33 UTCGHSA enrichment
  73. 2026-09-12 22:26 UTCEG score recompute
  74. 2026-09-12 22:26 UTCGHSA enrichment
  75. 2026-09-12 09:18 UTCGHSA enrichment

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Frequently asked(5)

What is CVE-2026-82657?
CVE-2026-82657 is a high vulnerability published on August 30, 2026. Admidio before 5.0.12 fails to enforce login-only module restrictions in RSS feed endpoints for forum and announcements modules. Unauthenticated attackers can retrieve forum topics and announcements by sending GET requests to rss/forum.php or rss/announcements.php, disclosing titles, full post…
When was CVE-2026-82657 disclosed?
CVE-2026-82657 was first published on August 30, 2026, with the most recent update on August 31, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-82657 actively exploited?
CVE-2026-82657 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.5% probability of exploitation in the next 30 days (37th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-82657?
CVE-2026-82657 has a CVSS base score of 7.5 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-82657?
No fix for CVE-2026-82657 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. The vendor advisories EchelonGraph has for CVE-2026-82657 are linked in the Vendor Advisories panel on this page.

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