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Fencer Vulns
medium 6.4

CVE-2025-53865 json

Roundup is vulnerable to XSS through interactions between URLs and issue tracker templates

published 2025-07-13 15 mo ago modified 2026-06-17 4 mo ago also EUVD-2025-21265 , GHSA-qxh9-qmf2-rhwc , PYSEC-2025-69

cvss
6.4
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 11%
public exploits
0
none known

Summary

In Roundup before 2.5.0, XSS can occur via interaction between URLs and issue tracker templates (devel and responsive).

Patch / fix

  • pypi roundup 2.5.0
  • roundup-tracker Roundup 2.5.0

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
15 mo ago

Exploit prediction

0.21% chance of exploitation in the next 30 days, higher than 11% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 6.4 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
GitHub 3.1 6.4 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

Affected packages

ecosystem package affected fixed in
pypi roundup
<2.5.0
2.5.0

Affected products

  • roundup-tracker Roundup

Classification

Weakness
  • CWE-79 Improper Neutralization of Input During Web Page Generation

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.