CVE-2021-40642

MEDIUMNVD 4.34.3—
EchelonGraph scoreMEDIUM confidence

Score 4.3 from GitHub Security Advisory published 2022-06-30. NVD baseline CVSS 4.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
4.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 4.3Exploit: None knownExposed: 0

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

Textpattern CMS v4.8.7 and older vulnerability exists through Sensitive Cookie in HTTPS Session Without 'Secure' Attribute via textpattern/lib/txplib_misc.php. The secure flag is not set for txp_login session cookie in the application. If the secure flag is not set, then the cookie will be transmitted in clear-text if the user visits any HTTP URLs within the cookie's scope. An attacker may be able to induce this event by feeding a user suitable links, either directly or via another web site.

CVSS v3
4.3
EG Score
4.3(medium)
EG Risk
24(Track)
EG Risk 24/100SSVC: 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%
Exploitation1% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
41%
KEV
Not listed

Published

June 29, 2022

Last Modified

November 21, 2024

References (4)

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 7× in last 7d / 29× 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 141 total refreshes for this CVE.

  1. 2026-08-25 13:46 UTCEPSS rescore
  2. 2026-08-24 14:13 UTCEPSS rescore
  3. 2026-08-23 00:16 UTCEPSS rescore
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  8. 2026-08-18 20:40 UTCOSV refresh
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  23. 2026-08-03 16:57 UTCOSV refresh
  24. 2026-08-03 10:33 UTCEPSS rescore
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  1. 2026-08-01 04:13 UTCEPSS rescore
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  10. 2026-07-23 02:04 UTCEG score recompute
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  20. 2026-07-17 04:54 UTCOSV refresh
  21. 2026-07-16 17:00 UTCEPSS rescore
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  44. 2026-07-02 16:57 UTCEPSS rescore
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  46. 2026-06-30 23:20 UTCEPSS rescore
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  48. 2026-06-29 14:04 UTCEPSS rescore
  49. 2026-06-29 03:02 UTCOSV refresh
  50. 2026-06-28 14:05 UTCEPSS rescore
  51. 2026-06-28 04:54 UTCEPSS rescore
  52. 2026-06-28 04:54 UTCEPSS rescore
  53. 2026-06-27 03:06 UTCEPSS rescore
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  55. 2026-06-25 13:48 UTCEPSS rescore
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  61. 2026-06-22 14:24 UTCEPSS rescore
  62. 2026-06-21 14:55 UTCEPSS rescore
  63. 2026-06-21 01:58 UTCEPSS rescore
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  65. 2026-06-19 19:24 UTCEPSS rescore
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  67. 2026-06-18 17:51 UTCEPSS rescore
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  72. 2026-06-16 17:51 UTCEPSS rescore
  73. 2026-06-16 17:51 UTCEPSS rescore
  74. 2026-06-15 17:46 UTCEPSS rescore
  75. 2026-06-14 23:15 UTCEPSS rescore

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2021-40642?
CVE-2021-40642 is a medium vulnerability published on June 29, 2022. Textpattern CMS v4.8.7 and older vulnerability exists through Sensitive Cookie in HTTPS Session Without 'Secure' Attribute via textpattern/lib/txplibmisc.php. The secure flag is not set for txplogin session cookie in the application. If the secure flag is not set, then the cookie will be…
When was CVE-2021-40642 disclosed?
CVE-2021-40642 was first published in the National Vulnerability Database on June 29, 2022, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2021-40642 actively exploited?
CVE-2021-40642 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 58.9% of all scored CVEs.
What is the CVSS score of CVE-2021-40642?
CVE-2021-40642 has a CVSS v3 base score of 4.3 (NVD).
How do I remediate CVE-2021-40642?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-40642, 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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