CVE-2021-29434

MEDIUMNVD 6.16.1—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 6.1 under NVD CVSS v3. EPSS exploit probability: 0.6%, top 54% 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
6.1EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 6.1Exploit: None knownExposed: 0

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

Wagtail is a Django content management system. In affected versions of Wagtail, when saving the contents of a rich text field in the admin interface, Wagtail does not apply server-side checks to ensure that link URLs use a valid protocol. A malicious user with access to the admin interface could thus craft a POST request to publish content with javascript: URLs containing arbitrary code. The vulnerability is not exploitable by an ordinary site visitor without access to the Wagtail admin. See referenced GitHub advisory for additional details, including a workaround. Patched versions have been released as Wagtail 2.11.7 (for the LTS 2.11 branch) and Wagtail 2.12.4 (for the current 2.12 branch).

CVSS v3
6.1
EG Score
6.1(medium)
EG Risk
32(Track)
EG Risk 32/100SSVC: 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
Severity61% × 45%
Exploitation1% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
49%
KEV
Not listed

Published

April 19, 2021

Last Modified

November 21, 2024

References (4)

Affected Packages

(1 across 1 ecosystem)
PyPI(1)
PackageVulnerable rangeFixed inDependents
wagtail0.1 ... 2.12.3 (142 versions)2.12.4—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 8× in last 7d / 31× 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 164 total refreshes for this CVE.

  1. 2026-09-18 19:23 UTCEPSS rescore
  2. 2026-09-17 19:23 UTCEPSS rescore
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  1. 2026-08-26 14:42 UTCEPSS rescore
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  7. 2026-08-20 05:04 UTCOSV refresh
  8. 2026-08-19 17:01 UTCEPSS rescore
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  22. 2026-08-05 19:14 UTCEPSS rescore
  23. 2026-08-05 00:10 UTCOSV refresh
  24. 2026-08-04 15:06 UTCEPSS rescore
  25. 2026-08-04 10:34 UTCEPSS rescore
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  39. 2026-07-23 01:59 UTCEG score recompute
  40. 2026-07-22 22:46 UTCEG score recompute
  41. 2026-07-22 14:06 UTCEPSS rescore
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  45. 2026-07-20 17:05 UTCEPSS rescore
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  49. 2026-07-18 22:29 UTCOSV refresh
  50. 2026-07-18 10:02 UTCEPSS rescore
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  53. 2026-07-15 16:55 UTCEPSS rescore
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  55. 2026-07-15 01:58 UTCEPSS rescore
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  63. 2026-07-09 19:07 UTCEPSS rescore
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  73. 2026-07-02 16:57 UTCEPSS rescore
  74. 2026-07-01 15:03 UTCEPSS rescore
  75. 2026-07-01 05:18 UTCOSV refresh

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2021-29434?
CVE-2021-29434 is a medium vulnerability published on April 19, 2021. Wagtail is a Django content management system. In affected versions of Wagtail, when saving the contents of a rich text field in the admin interface, Wagtail does not apply server-side checks to ensure that link URLs use a valid protocol. A malicious user with access to the admin interface could…
When was CVE-2021-29434 disclosed?
CVE-2021-29434 was first published in the National Vulnerability Database on April 19, 2021, 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-2021-29434 actively exploited?
CVE-2021-29434 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 51.4% of all scored CVEs.
What is the CVSS score of CVE-2021-29434?
CVE-2021-29434 has a CVSS v3 base score of 6.1 (NVD).
How do I remediate CVE-2021-29434?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-29434, 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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