CVE-2026-67350

MEDIUMPre-NVD 4.34.3—
EchelonGraph scoreMEDIUM confidence

Score 4.3 from GitHub Security Advisory (severity: LOW) published 2026-07-31. a secondary CVSS source baseline 4.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this weekElevated
4.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 4.3Exploit: Elevated riskExposed: 0

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

Serendipity before 2.6.1 contains an open redirect vulnerability in exit.php that allows unauthenticated attackers to redirect users to arbitrary external sites by supplying a malicious Base64-encoded url parameter when the Track Exits plugin is configured with commentredirection set to s9y. Attackers can craft trusted-looking URLs leveraging the legitimate blog domain to conduct phishing, deliver malware, or bypass URL reputation filters.

CVSS v3
4.3
EG Score
4.3(medium)
EG Risk
35(Track)
EG Risk 35/100SSVC: Track

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
Severity43% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
18%
KEV
Not listed

Published

July 31, 2026

Last Modified

September 9, 2026

Advisory Details (2)

Auto-updated Jul 31, 2026
🔬 Proof of concept available. Patch available. Sources: github.
generic

Serendipity < 2.6.1 Open Redirect via exit.php | Advisories | VulnCheck

https://www.vulncheck.com/advisories/serendipity-open-redirect-via-exit-php
github Patch Available🟡 PoC Available

An open redirect vulnerability in `exit.php` allows any unauthenticated attacker to craft a URL that appears to originate from a trusted Serendipity blog domain · Advisory · s9y/Serendipity · GitHub

https://github.com/s9y/Serendipity/security/advisories/GHSA-77rw-27c5-4hxm

Vendor Advisories for CVE-2026-67350(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 16× in last 7d / 71× 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 134 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-67350?
CVE-2026-67350 is a medium vulnerability published on July 31, 2026. Serendipity before 2.6.1 contains an open redirect vulnerability in exit.php that allows unauthenticated attackers to redirect users to arbitrary external sites by supplying a malicious Base64-encoded url parameter when the Track Exits plugin is configured with commentredirection set to s9y.…
When was CVE-2026-67350 disclosed?
CVE-2026-67350 was first published in the National Vulnerability Database on July 31, 2026, with the most recent update on September 9, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-67350 actively exploited?
CVE-2026-67350 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 82.1% of all scored CVEs.
What is the CVSS score of CVE-2026-67350?
CVE-2026-67350 has a CVSS v3 base score of 4.3 (NVD).
How do I remediate CVE-2026-67350?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-67350, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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