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CVE-2026-48788

Remark42 is a self-hosted comment engine for blogs, articles, or any other place where readers can add comments. Versions 1.6.0 through 1.15.0 contain a Cross-Site Scripting (XSS) vulnerability exploitable through content-type spoofing. The Remark42 image proxy fetches an arbitrary remote URL and re-serves the response from Remark42's own origin. During the download phase, the proxy determines whether the resource is an image by inspecting only the Content-Type header advertised by the remote se
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:ab998300a9575f2613f9373f708c0d8f925b1f5dc06c747d846d472c7187c56b
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-436","description":"CWE-436: Interpretation Conflict","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:a1de8c464335a268071c0f53ae000bd14caca495cf6cab830944182483d26e16 · sha256:525ed886327640a6… · /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:a1de8c464335a268071c0f53ae000bd14caca495cf6cab830944182483d26e16 · sha256:525ed886327640a6… · /containers/cna/problemTypes/0/descriptions/0

Affected products and versions

1 source assertion
{"product":"remark42","vendor":"umputun","versions":[{"status":"affected","version":">= 1.6.0, < 1.16.0"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:a1de8c464335a268071c0f53ae000bd14caca495cf6cab830944182483d26e16 · sha256:525ed886327640a6… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":8.2,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"LOW","privilegesRequired":"NONE","scope":"CHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N","version":"3.0"},"metric_type":"cvssV3_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:a1de8c464335a268071c0f53ae000bd14caca495cf6cab830944182483d26e16 · sha256:525ed886327640a6… · /containers/cna/metrics/0/cvssV3_0

CWE assertions

2 source assertions
{"cweId":"CWE-436","description":"CWE-436: Interpretation Conflict","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:a1de8c464335a268071c0f53ae000bd14caca495cf6cab830944182483d26e16 · sha256:525ed886327640a6… · /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:a1de8c464335a268071c0f53ae000bd14caca495cf6cab830944182483d26e16 · sha256:525ed886327640a6… · /containers/cna/problemTypes/0/descriptions/0

Source references

4 source assertions
{"name":"https://github.com/umputun/remark42/commit/78d6de6bce1e961f023969da3ec8a00dd80c9ae8","tags":["x_refsource_MISC"],"url":"https://github.com/umputun/remark42/commit/78d6de6bce1e961f023969da3ec8a00dd80c9ae8"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:a1de8c464335a268071c0f53ae000bd14caca495cf6cab830944182483d26e16 · sha256:525ed886327640a6… · /containers/cna/references/1
{"name":"https://github.com/umputun/remark42/releases/tag/v1.16.0","tags":["x_refsource_MISC"],"url":"https://github.com/umputun/remark42/releases/tag/v1.16.0"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:a1de8c464335a268071c0f53ae000bd14caca495cf6cab830944182483d26e16 · sha256:525ed886327640a6… · /containers/cna/references/2
{"name":"https://github.com/umputun/remark42/security/advisories/GHSA-4c8j-mgm4-qqvp","tags":["x_refsource_CONFIRM"],"url":"https://github.com/umputun/remark42/security/advisories/GHSA-4c8j-mgm4-qqvp"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:a1de8c464335a268071c0f53ae000bd14caca495cf6cab830944182483d26e16 · sha256:525ed886327640a6… · /containers/cna/references/0
{"tags":["exploit"],"url":"https://github.com/umputun/remark42/security/advisories/GHSA-4c8j-mgm4-qqvp"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:a1de8c464335a268071c0f53ae000bd14caca495cf6cab830944182483d26e16 · sha256:525ed886327640a6… · /containers/adp/0/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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