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CVE-2026-44742

Postorius through 1.3.13 does not escape HTML in the message subject when rendering it in the Held messages pop-up, as exploited in the wild in May 2026.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:d2e1a75f58c9e4a2dcfb25aa64b068c47a3267d45c7ca4973226df0562854806
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0

Affected products and versions

1 source assertion
{"defaultStatus":"unknown","packageURL":"pkg:pypi/postorius","product":"Postorius","vendor":"Postorius project","versions":[{"lessThanOrEqual":"1.3.13","status":"affected","version":"0","versionType":"semver"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:ea367fcecbb1383299dc715912d005e7dbfc61c273daf9314bfba26dc17f346b · sha256:cf1e2e7f4888ed97… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":7.2,"baseSeverity":"HIGH","confidentialityImpact":"LOW","integrityImpact":"LOW","privilegesRequired":"NONE","scope":"CHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:ea367fcecbb1383299dc715912d005e7dbfc61c273daf9314bfba26dc17f346b · sha256:cf1e2e7f4888ed97… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-79","description":"CWE-79 Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting')","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:ea367fcecbb1383299dc715912d005e7dbfc61c273daf9314bfba26dc17f346b · sha256:cf1e2e7f4888ed97… · /containers/cna/problemTypes/0/descriptions/0

Source references

5 source assertions
{"url":"https://gitlab.com/mailman/postorius/-/commit/c4706abd05ba6bcf472fc674b160d3a9d6a4868b"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:ea367fcecbb1383299dc715912d005e7dbfc61c273daf9314bfba26dc17f346b · sha256:cf1e2e7f4888ed97… · /containers/cna/references/0
{"url":"https://gitlab.com/mailman/postorius/-/issues/620"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:ea367fcecbb1383299dc715912d005e7dbfc61c273daf9314bfba26dc17f346b · sha256:cf1e2e7f4888ed97… · /containers/cna/references/2
{"url":"https://gitlab.com/mailman/postorius/-/merge_requests/972"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:ea367fcecbb1383299dc715912d005e7dbfc61c273daf9314bfba26dc17f346b · sha256:cf1e2e7f4888ed97… · /containers/cna/references/1
{"url":"https://lists.debian.org/debian-lts-announce/2026/05/msg00045.html"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:ea367fcecbb1383299dc715912d005e7dbfc61c273daf9314bfba26dc17f346b · sha256:cf1e2e7f4888ed97… · /containers/adp/1/references/0
{"url":"https://www.openwall.com/lists/oss-security/2026/05/07/3"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:ea367fcecbb1383299dc715912d005e7dbfc61c273daf9314bfba26dc17f346b · sha256:cf1e2e7f4888ed97… · /containers/cna/references/3

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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