Baitaphish
Security intelligence
SearchLatest briefing
CVE Explorer

CVE-2025-68113

ALTCHA is privacy-first software for captcha and bot protection. A cryptographic semantic binding flaw in ALTCHA libraries allows challenge payload splicing, which may enable replay attacks. The HMAC signature does not unambiguously bind challenge parameters to the nonce, allowing an attacker to reinterpret a valid proof-of-work submission with a modified expiration value. This may allow previously solved challenges to be reused beyond their intended lifetime, depending on server-side replay han
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:102545b510666c5178f9a3a13ad9d3aed00b02aa05131fe6085dc30cd78d09f9
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

cwe · 2 assertions

{"cweId":"CWE-347","description":"CWE-347: Improper Verification of Cryptographic Signature","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:509594575178d49f544c4c3d70a91aa50d1099da72fb93799fe9fd7bd8d49be0 · sha256:2d3cb744a5254fbb… · /containers/cna/problemTypes/1/descriptions/0

{"cweId":"CWE-115","description":"CWE-115: Misinterpretation of Input","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:509594575178d49f544c4c3d70a91aa50d1099da72fb93799fe9fd7bd8d49be0 · sha256:2d3cb744a5254fbb… · /containers/cna/problemTypes/0/descriptions/0

Affected products and versions

1 source assertion
{"product":"altcha-lib","vendor":"altcha-org","versions":[{"status":"affected","version":"< 1.4.1"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:509594575178d49f544c4c3d70a91aa50d1099da72fb93799fe9fd7bd8d49be0 · sha256:2d3cb744a5254fbb… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"LOW","baseScore":6.5,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"LOW","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:509594575178d49f544c4c3d70a91aa50d1099da72fb93799fe9fd7bd8d49be0 · sha256:2d3cb744a5254fbb… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

2 source assertions
{"cweId":"CWE-347","description":"CWE-347: Improper Verification of Cryptographic Signature","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:509594575178d49f544c4c3d70a91aa50d1099da72fb93799fe9fd7bd8d49be0 · sha256:2d3cb744a5254fbb… · /containers/cna/problemTypes/1/descriptions/0
{"cweId":"CWE-115","description":"CWE-115: Misinterpretation of Input","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:509594575178d49f544c4c3d70a91aa50d1099da72fb93799fe9fd7bd8d49be0 · sha256:2d3cb744a5254fbb… · /containers/cna/problemTypes/0/descriptions/0

Source references

10 source assertions
{"name":"https://github.com/altcha-org/altcha-lib-ex/commit/09b2bad466ad0338a5b24245380950ea9918333e","tags":["x_refsource_MISC"],"url":"https://github.com/altcha-org/altcha-lib-ex/commit/09b2bad466ad0338a5b24245380950ea9918333e"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:509594575178d49f544c4c3d70a91aa50d1099da72fb93799fe9fd7bd8d49be0 · sha256:2d3cb744a5254fbb… · /containers/cna/references/1
{"name":"https://github.com/altcha-org/altcha-lib-go/commit/4a5610745ef79895a67bac858b2e4f291c2614b8","tags":["x_refsource_MISC"],"url":"https://github.com/altcha-org/altcha-lib-go/commit/4a5610745ef79895a67bac858b2e4f291c2614b8"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:509594575178d49f544c4c3d70a91aa50d1099da72fb93799fe9fd7bd8d49be0 · sha256:2d3cb744a5254fbb… · /containers/cna/references/2
{"name":"https://github.com/altcha-org/altcha-lib-java/commit/69277651fdd6418ae10bf3a088901506f9c62114","tags":["x_refsource_MISC"],"url":"https://github.com/altcha-org/altcha-lib-java/commit/69277651fdd6418ae10bf3a088901506f9c62114"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:509594575178d49f544c4c3d70a91aa50d1099da72fb93799fe9fd7bd8d49be0 · sha256:2d3cb744a5254fbb… · /containers/cna/references/3
{"name":"https://github.com/altcha-org/altcha-lib-java/releases/tag/v1.3.0","tags":["x_refsource_MISC"],"url":"https://github.com/altcha-org/altcha-lib-java/releases/tag/v1.3.0"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:509594575178d49f544c4c3d70a91aa50d1099da72fb93799fe9fd7bd8d49be0 · sha256:2d3cb744a5254fbb… · /containers/cna/references/7
{"name":"https://github.com/altcha-org/altcha-lib-php/commit/9e9e70c864a9db960d071c77c778be0c9ff1a4d0","tags":["x_refsource_MISC"],"url":"https://github.com/altcha-org/altcha-lib-php/commit/9e9e70c864a9db960d071c77c778be0c9ff1a4d0"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:509594575178d49f544c4c3d70a91aa50d1099da72fb93799fe9fd7bd8d49be0 · sha256:2d3cb744a5254fbb… · /containers/cna/references/4
{"name":"https://github.com/altcha-org/altcha-lib-php/releases/tag/v1.3.1","tags":["x_refsource_MISC"],"url":"https://github.com/altcha-org/altcha-lib-php/releases/tag/v1.3.1"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:509594575178d49f544c4c3d70a91aa50d1099da72fb93799fe9fd7bd8d49be0 · sha256:2d3cb744a5254fbb… · /containers/cna/references/8
{"name":"https://github.com/altcha-org/altcha-lib-rb/commit/4fd7b64cbbfc713f3ca4e066c2dd466e3b8d359b","tags":["x_refsource_MISC"],"url":"https://github.com/altcha-org/altcha-lib-rb/commit/4fd7b64cbbfc713f3ca4e066c2dd466e3b8d359b"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:509594575178d49f544c4c3d70a91aa50d1099da72fb93799fe9fd7bd8d49be0 · sha256:2d3cb744a5254fbb… · /containers/cna/references/5
{"name":"https://github.com/altcha-org/altcha-lib/commit/cb95d83a8d08e273b6be15e48988e7eaf60d5c08","tags":["x_refsource_MISC"],"url":"https://github.com/altcha-org/altcha-lib/commit/cb95d83a8d08e273b6be15e48988e7eaf60d5c08"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:509594575178d49f544c4c3d70a91aa50d1099da72fb93799fe9fd7bd8d49be0 · sha256:2d3cb744a5254fbb… · /containers/cna/references/6
{"name":"https://github.com/altcha-org/altcha-lib/releases/tag/1.4.1","tags":["x_refsource_MISC"],"url":"https://github.com/altcha-org/altcha-lib/releases/tag/1.4.1"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:509594575178d49f544c4c3d70a91aa50d1099da72fb93799fe9fd7bd8d49be0 · sha256:2d3cb744a5254fbb… · /containers/cna/references/9
{"name":"https://github.com/altcha-org/altcha-lib/security/advisories/GHSA-6gvq-jcmp-8959","tags":["x_refsource_CONFIRM"],"url":"https://github.com/altcha-org/altcha-lib/security/advisories/GHSA-6gvq-jcmp-8959"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:509594575178d49f544c4c3d70a91aa50d1099da72fb93799fe9fd7bd8d49be0 · sha256:2d3cb744a5254fbb… · /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.

← Back to CVE Explorer