How severe is CVE-2025-0825?

CVE-2025-0825 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability none.

Is CVE-2025-0825 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (31st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-0825?

CVE-2025-0825 affects Yhirose Cpp-httplib. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-0825?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2025-0825 have an EU (EUVD) identifier?

Yes. CVE-2025-0825 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-1886.

When was CVE-2025-0825 published?

CVE-2025-0825 was published on 2025-02-04 and last updated on 2026-06-17.

CVE-2025-0825

CVE-2025-0825 is a medium-severity vulnerability in Yhirose Cpp-httplib with a CVSS 3.x base score of 5.3. 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-113.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
CVSS v4: 6.9
EPSS exploit prediction: 0% (31st percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-1886
Weakness: CWE-113
Affected product: Yhirose Cpp-httplib
Published: 2025-02-04
Last modified: 2026-06-17

Description

cpp-httplib version v0.17.3 through v0.18.3 fails to filter CRLF characters ("\r\n") when those are prefixed with a null byte. This enables attackers to exploit CRLF injection that could further lead to HTTP Response Splitting, XSS, and more.

Frequently asked questions

What is CVE-2025-0825?: cpp-httplib version v0.17.3 through v0.18.3 fails to filter CRLF characters ("\r\n") when those are prefixed with a null byte. This enables attackers to exploit CRLF injection that could further lead to HTTP Response Splitting, XSS, and more.
How severe is CVE-2025-0825?: CVE-2025-0825 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability none.
Is CVE-2025-0825 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (31st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-0825?: CVE-2025-0825 affects Yhirose Cpp-httplib. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-0825?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-0825 have an EU (EUVD) identifier?: Yes. CVE-2025-0825 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-1886.
When was CVE-2025-0825 published?: CVE-2025-0825 was published on 2025-02-04 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:yhirose:cpp-httplib:*:*:*:*:*:*:*:*

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