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Fencer Vulns
medium 4.3

CVE-2025-8814 json

atjiu pybbs CookieUtil.java setCookie cross-site request forgery

published 2025-08-10 14 mo ago modified 2026-06-17 4 mo ago also EUVD-2025-24094

cvss
4.3
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 33%
public exploits
0
none known

Summary

A vulnerability was found in atjiu pybbs up to 6.0.0 and classified as problematic. This issue affects the function setCookie of the file src/main/java/co/yiiu/pybbs/util/CookieUtil.java. The manipulation leads to cross-site request forgery. The attack may be initiated remotely. The exploit has been disclosed to the public and may be used. The patch is named 8aa2bb1aef3346e49aec6358edf5e47ce905ae7b. It is recommended to apply a patch to fix this issue.

Patch / fix

CISA SSVC

Exploitation
Proof of concept is public
Automatable
no
Technical impact
partial
Assessed
14 mo ago

Exploit prediction

0.39% chance of exploitation in the next 30 days, higher than 33% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/atjiu/pybbs/issues/211 referenced PoC, tagged "exploit" by a source, unverified
  • github.com https://github.com/atjiu/pybbs/issues/211#issuecomment-3134960777 referenced PoC, tagged "exploit" by a source, unverified
  • github.com https://github.com/atjiu/pybbs/issues/211#issue-3256483043 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 4.0 5.3 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P
CNA 3.1 4.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N/E:P/RL:O/RC:C
CNA 3.0 4.3 CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N/E:P/RL:O/RC:C
CNA 2.0 5.0 AV:N/AC:L/Au:N/C:N/I:P/A:N/E:POC/RL:OF/RC:C
CNA 4.0 2.1 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CNA 3.1 4.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
CNA 2.0 5.0 AV:N/AC:L/Au:N/C:N/I:P/A:N

Affected products

  • atjiu pybbs

Classification

Weakness

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.