CVE Explorer

CVE-2026-42451

Grimmory is a self-hosted digital library. Prior to version 2.3.1, a stored cross-site scripting (XSS) vulnerability in Grimmory's browser-based EPUB reader allows an attacker to embed arbitrary JavaScript in a crafted EPUB file. When a victim opens the book, the script executes in their browser with full access to the Grimmory application's session context. This can enable session token theft and account takeover, including administrative access if an administrator opens the affected book. This

Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:c0d3e70ffddab8d702d4a028928eece4fa9ff3083bbbbd7b979681782b023058

Known exploited

Not asserted

Disputed

Stale source

Conflicts

Preserved source conflicts

No provider value was silently selected as the winner.

cwe · 2 assertions

{"cweId":"CWE-80","description":"CWE-80: Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)","lang":"en","type":"CWE"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:fed9b3f015d61f34aa3943f2e9c4579cf5f7558beb1df19f91432b2691c39da3 · sha256:9c0e374f8164ce34… · /containers/cna/problemTypes/1/descriptions/0

{"cweId":"CWE-79","description":"CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')","lang":"en","type":"CWE"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:fed9b3f015d61f34aa3943f2e9c4579cf5f7558beb1df19f91432b2691c39da3 · sha256:9c0e374f8164ce34… · /containers/cna/problemTypes/0/descriptions/0

Affected products and versions

1 source assertion

{"product":"grimmory","vendor":"grimmory-tools","versions":[{"status":"affected","version":"< 2.3.1"}]}

cve_program_cvelist_v5affected
urn:baitaphish:normalized-source-record:v2:fed9b3f015d61f34aa3943f2e9c4579cf5f7558beb1df19f91432b2691c39da3 · sha256:9c0e374f8164ce34… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion

{"metric":{"attackComplexity":"HIGH","attackVector":"LOCAL","availabilityImpact":"LOW","baseScore":6.3,"baseSeverity":"MEDIUM","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:L","version":"3.1"},"metric_type":"cvssV3_1"}

cve_program_cvelist_v5cvss
urn:baitaphish:normalized-source-record:v2:fed9b3f015d61f34aa3943f2e9c4579cf5f7558beb1df19f91432b2691c39da3 · sha256:9c0e374f8164ce34… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

2 source assertions

{"cweId":"CWE-80","description":"CWE-80: Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)","lang":"en","type":"CWE"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:fed9b3f015d61f34aa3943f2e9c4579cf5f7558beb1df19f91432b2691c39da3 · sha256:9c0e374f8164ce34… · /containers/cna/problemTypes/1/descriptions/0

{"cweId":"CWE-79","description":"CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')","lang":"en","type":"CWE"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:fed9b3f015d61f34aa3943f2e9c4579cf5f7558beb1df19f91432b2691c39da3 · sha256:9c0e374f8164ce34… · /containers/cna/problemTypes/0/descriptions/0

Source references

2 source assertions

{"name":"http://github.com/grimmory-tools/grimmory/releases/tag/v2.3.1","tags":["x_refsource_MISC"],"url":"http://github.com/grimmory-tools/grimmory/releases/tag/v2.3.1"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:fed9b3f015d61f34aa3943f2e9c4579cf5f7558beb1df19f91432b2691c39da3 · sha256:9c0e374f8164ce34… · /containers/cna/references/1

{"name":"https://github.com/grimmory-tools/grimmory/security/advisories/GHSA-frv6-5wq5-9p24","tags":["x_refsource_CONFIRM"],"url":"https://github.com/grimmory-tools/grimmory/security/advisories/GHSA-frv6-5wq5-9p24"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:fed9b3f015d61f34aa3943f2e9c4579cf5f7558beb1df19f91432b2691c39da3 · sha256:9c0e374f8164ce34… · /containers/cna/references/0

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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