How severe is CVE-2025-68475?

CVE-2025-68475 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2025-68475 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (38th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-68475?

CVE-2025-68475 affects Fedify. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-68475?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2025-68475 have an EU (EUVD) identifier?

Yes. CVE-2025-68475 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-204741.

When was CVE-2025-68475 published?

CVE-2025-68475 was published on 2025-12-22 and last updated on 2026-06-17.

CVE-2025-68475

CVE-2025-68475 is a high-severity vulnerability in Fedify with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-1333.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 0% (38th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-204741
Weakness: CWE-1333
Affected product: Fedify
Published: 2025-12-22
Last modified: 2026-06-17

Description

Fedify is a TypeScript library for building federated server apps powered by ActivityPub. Prior to versions 1.6.13, 1.7.14, 1.8.15, and 1.9.2, a Regular Expression Denial of Service (ReDoS) vulnerability exists in Fedify's document loader. The HTML parsing regex at packages/fedify/src/runtime/docloader.ts:259 contains nested quantifiers that cause catastrophic backtracking when processing maliciously crafted HTML responses. This issue has been patched in versions 1.6.13, 1.7.14, 1.8.15, and 1.9.2.

Frequently asked questions

What is CVE-2025-68475?: Fedify is a TypeScript library for building federated server apps powered by ActivityPub. Prior to versions 1.6.13, 1.7.14, 1.8.15, and 1.9.2, a Regular Expression Denial of Service (ReDoS) vulnerability exists in Fedify's document loader. The HTML parsing regex at packages/fedify/src/runtime/docloader.ts:259 contains nested quantifiers that cause catastrophic backtracking when processing maliciously crafted HTML responses. This issue has been patched in versions 1.6.13, 1.7.14, 1.8.15, and 1.9.2.
How severe is CVE-2025-68475?: CVE-2025-68475 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2025-68475 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (38th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-68475?: CVE-2025-68475 affects Fedify. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-68475?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2025-68475 have an EU (EUVD) identifier?: Yes. CVE-2025-68475 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-204741.
When was CVE-2025-68475 published?: CVE-2025-68475 was published on 2025-12-22 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:fedify:fedify:*:*:*:*:*:*:*:*

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